21025832620 has 48 divisors (see below), whose sum is σ = 48152684160. Its totient is φ = 7665106176.

The previous prime is 21025832603. The next prime is 21025832701. The reversal of 21025832620 is 2623852012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 491287 + ... + 532366.

It is an arithmetic number, because the mean of its divisors is an integer number (1003180920).

Almost surely, 2^21025832620 is an apocalyptic number.

21025832620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21025832620 is an abundant number, since it is smaller than the sum of its proper divisors (27126851540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21025832620 is a wasteful number, since it uses less digits than its factorization.

21025832620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023754 (or 1023752 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 21025832620 in words is "twenty-one billion, twenty-five million, eight hundred thirty-two thousand, six hundred twenty".