21274137324 has 48 divisors (see below), whose sum is σ = 60169280640. Its totient is φ = 6446707920.

The previous prime is 21274137319. The next prime is 21274137349. The reversal of 21274137324 is 42373147212.

21274137324 is a `hidden beast` number, since 212 + 7 + 413 + 7 + 3 + 24 = 666.

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

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, 8952574 + ... + 8954949.

It is an arithmetic number, because the mean of its divisors is an integer number (1253526680).

Almost surely, 2^21274137324 is an apocalyptic number.

It is an amenable number.

21274137324 is an abundant number, since it is smaller than the sum of its proper divisors (38895143316).

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

21274137324 is a wasteful number, since it uses less digits than its factorization.

21274137324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17907547 (or 17907539 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The spelling of 21274137324 in words is "twenty-one billion, two hundred seventy-four million, one hundred thirty-seven thousand, three hundred twenty-four".