21107564274 has 32 divisors (see below), whose sum is σ = 42505182720. Its totient is φ = 6987635712.

The previous prime is 21107564243. The next prime is 21107564279. The reversal of 21107564274 is 47246570112.

It is a super-2 number, since 2×21107564274² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21107564279) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 687892 + ... + 717920.

It is an arithmetic number, because the mean of its divisors is an integer number (1328286960).

Almost surely, 2^21107564274 is an apocalyptic number.

21107564274 is an abundant number, since it is smaller than the sum of its proper divisors (21397618446).

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

21107564274 is a wasteful number, since it uses less digits than its factorization.

21107564274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30834.

The product of its (nonzero) digits is 94080, while the sum is 39.

The spelling of 21107564274 in words is "twenty-one billion, one hundred seven million, five hundred sixty-four thousand, two hundred seventy-four".