21274767024 has 80 divisors (see below), whose sum is σ = 64977150720. Its totient is φ = 5868898560.

The previous prime is 21274766993. The next prime is 21274767049. The reversal of 21274767024 is 42076747212.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 1081942 + ... + 1101429.

It is an arithmetic number, because the mean of its divisors is an integer number (812214384).

Almost surely, 2^21274767024 is an apocalyptic number.

21274767024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21274767024 is an abundant number, since it is smaller than the sum of its proper divisors (43702383696).

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

21274767024 is a wasteful number, since it uses less digits than its factorization.

21274767024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2183418 (or 2183412 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 42.

The spelling of 21274767024 in words is "twenty-one billion, two hundred seventy-four million, seven hundred sixty-seven thousand, twenty-four".