21574131392 has 28 divisors (see below), whose sum is σ = 46703092776. Its totient is φ = 9806423040.

The previous prime is 21574131391. The next prime is 21574131437. The reversal of 21574131392 is 29313147512.

It is not an unprimeable number, because it can be changed into a prime (21574131391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15321833 + ... + 15323240.

Almost surely, 2^21574131392 is an apocalyptic number.

21574131392 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21574131392 is an abundant number, since it is smaller than the sum of its proper divisors (25128961384).

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

21574131392 is a wasteful number, since it uses less digits than its factorization.

21574131392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30645096 (or 30645086 counting only the distinct ones).

The product of its digits is 45360, while the sum is 38.

The spelling of 21574131392 in words is "twenty-one billion, five hundred seventy-four million, one hundred thirty-one thousand, three hundred ninety-two".