21137474112 has 56 divisors (see below), whose sum is σ = 56139014976. Its totient is φ = 7019017728.

The previous prime is 21137474089. The next prime is 21137474119. The reversal of 21137474112 is 21147473112.

It is not an unprimeable number, because it can be changed into a prime (21137474119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158803 + ... + 259794.

Almost surely, 2^21137474112 is an apocalyptic number.

It is an amenable number.

21137474112 is an abundant number, since it is smaller than the sum of its proper divisors (35001540864).

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

21137474112 is a wasteful number, since it uses less digits than its factorization.

21137474112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418875 (or 418865 counting only the distinct ones).

The product of its digits is 9408, while the sum is 33.

The spelling of 21137474112 in words is "twenty-one billion, one hundred thirty-seven million, four hundred seventy-four thousand, one hundred twelve".