21037360128 has 44 divisors (see below), whose sum is σ = 56072242800. Its totient is φ = 7012452352.

The previous prime is 21037360103. The next prime is 21037360147. The reversal of 21037360128 is 82106373012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3420978 + ... + 3427121.

Almost surely, 2^21037360128 is an apocalyptic number.

It is an amenable number.

21037360128 is an abundant number, since it is smaller than the sum of its proper divisors (35034882672).

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

21037360128 is an equidigital number, since it uses as much as digits as its factorization.

21037360128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6848122 (or 6848104 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The spelling of 21037360128 in words is "twenty-one billion, thirty-seven million, three hundred sixty thousand, one hundred twenty-eight".