| Base | Representation |
|---|---|
| bin | 101000000111… |
| … | …1011100110000 |
| 3 | 1110120200022200 |
| 4 | 1100033130300 |
| 5 | 20341103200 |
| 6 | 2030503200 |
| 7 | 343535643 |
| oct | 120173460 |
| 9 | 43520280 |
| 10 | 21034800 |
| 11 | 10967836 |
| 12 | 7064b00 |
| 13 | 4486437 |
| 14 | 2b17a5a |
| 15 | 1ca7800 |
| hex | 140f730 |
21034800 has 90 divisors (see below), whose sum is σ = 73009092. Its totient is φ = 5608320.
The previous prime is 21034787. The next prime is 21034807. The reversal of 21034800 is 843012.
It is a happy number.
It is a tau number, because it is divible by the number of its divisors (90).
It is a super-2 number, since 2×210348002 = 884925622080000, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is not an unprimeable number, because it can be changed into a prime (21034807) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 679 + ... + 6521.
Almost surely, 221034800 is an apocalyptic number.
21034800 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 21034800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36504546).
21034800 is an abundant number, since it is smaller than the sum of its proper divisors (51974292).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21034800 is a wasteful number, since it uses less digits than its factorization.
21034800 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 5867 (or 5853 counting only the distinct ones).
The product of its (nonzero) digits is 192, while the sum is 18.
The square root of 21034800 is about 4586.3711145087. The cubic root of 21034800 is about 276.0447312503.
Adding to 21034800 its reverse (843012), we get a palindrome (21877812).
It can be divided in two parts, 2103 and 4800, that added together give a triangular number (6903 = T117).
The spelling of 21034800 in words is "twenty-one million, thirty-four thousand, eight hundred".
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