21053379024 has 30 divisors (see below), whose sum is σ = 58920220866. Its totient is φ = 7017792960.

The previous prime is 21053379019. The next prime is 21053379031. The reversal of 21053379024 is 42097335012.

21053379024 is a `hidden beast` number, since 2 + 10 + 533 + 7 + 90 + 24 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16752642624 + 4300736400 = 129432^2 + 65580^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 21053379024.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73101867 + ... + 73102154.

Almost surely, 2^21053379024 is an apocalyptic number.

21053379024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21053379024 is an abundant number, since it is smaller than the sum of its proper divisors (37866841842).

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

21053379024 is a wasteful number, since it uses less digits than its factorization.

21053379024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146204035 (or 146204026 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The spelling of 21053379024 in words is "twenty-one billion, fifty-three million, three hundred seventy-nine thousand, twenty-four".