Base | Representation |
---|---|
bin | 10010101111100011… |
… | …111011100010001000 |
3 | 1220221120022012201210 |
4 | 102233203323202020 |
5 | 312204034111442 |
6 | 13125003013120 |
7 | 1311503143365 |
oct | 225743734210 |
9 | 56846265653 |
10 | 20125300872 |
11 | 8598231466 |
12 | 3a97b0a1a0 |
13 | 1b89639571 |
14 | d8cbc146c |
15 | 7cbc6c19c |
hex | 4af8fb888 |
20125300872 has 32 divisors (see below), whose sum is σ = 50709427200. Its totient is φ = 6655610304.
The previous prime is 20125300861. The next prime is 20125300873. The reversal of 20125300872 is 27800352102.
It is not an unprimeable number, because it can be changed into a prime (20125300873) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3298347 + ... + 3304442.
It is an arithmetic number, because the mean of its divisors is an integer number (1584669600).
Almost surely, 220125300872 is an apocalyptic number.
It is an amenable number.
20125300872 is an abundant number, since it is smaller than the sum of its proper divisors (30584126328).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20125300872 is a wasteful number, since it uses less digits than its factorization.
20125300872 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 6602925 (or 6602921 counting only the distinct ones).
The product of its (nonzero) digits is 6720, while the sum is 30.
Adding to 20125300872 its reverse (27800352102), we get a palindrome (47925652974).
The spelling of 20125300872 in words is "twenty billion, one hundred twenty-five million, three hundred thousand, eight hundred seventy-two".
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