| Base | Representation |
|---|---|
| bin | 1001100011011110100100… |
| … | …01111001001101101010100 |
| 3 | 2202101120000211000001212100 |
| 4 | 10301233102033021231110 |
| 5 | 10223212403312411040 |
| 6 | 112403542552122100 |
| 7 | 4265636434224054 |
| oct | 461572217115524 |
| 9 | 82346024001770 |
| 10 | 21010212232020 |
| 11 | 6770421085000 |
| 12 | 2433b05696330 |
| 13 | b953402177cb |
| 14 | 528c84ab1564 |
| 15 | 2667cce2db30 |
| hex | 131bd23c9b54 |
21010212232020 has 288 divisors, whose sum is σ = 70115015303424. Its totient is φ = 5092242059520.
The previous prime is 21010212232003. The next prime is 21010212232033. The reversal of 21010212232020 is 2023221201012.
21010212232020 is a `hidden beast` number, since 210 + 10 + 2 + 122 + 320 + 2 + 0 = 666.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a junction number, because it is equal to n+sod(n) for n = 21010212231984 and 21010212232002.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (23) of ones.
It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1634647914 + ... + 1634660766.
It is an arithmetic number, because the mean of its divisors is an integer number (243454914248).
Almost surely, 221010212232020 is an apocalyptic number.
21010212232020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 21010212232020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35057507651712).
21010212232020 is an abundant number, since it is smaller than the sum of its proper divisors (49104803071404).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21010212232020 is a wasteful number, since it uses less digits than its factorization.
21010212232020 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 19724 (or 19697 counting only the distinct ones).
The product of its (nonzero) digits is 192, while the sum is 18.
Adding to 21010212232020 its reverse (2023221201012), we get a palindrome (23033433433032).
The spelling of 21010212232020 in words is "twenty-one trillion, ten billion, two hundred twelve million, two hundred thirty-two thousand, twenty".
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