21153025104 has 40 divisors (see below), whose sum is σ = 54653376960. Its totient is φ = 7049968128.

The previous prime is 21153025067. The next prime is 21153025121. The reversal of 21153025104 is 40152035112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340312 + ... + 397640.

It is an arithmetic number, because the mean of its divisors is an integer number (1366334424).

Almost surely, 2^21153025104 is an apocalyptic number.

21153025104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21153025104 is an abundant number, since it is smaller than the sum of its proper divisors (33500351856).

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

21153025104 is a wasteful number, since it uses less digits than its factorization.

21153025104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65027 (or 65021 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The spelling of 21153025104 in words is "twenty-one billion, one hundred fifty-three million, twenty-five thousand, one hundred four".