21112307574 has 48 divisors (see below), whose sum is σ = 43895055360. Its totient is φ = 6769254240.

The previous prime is 21112307561. The next prime is 21112307581. The reversal of 21112307574 is 47570321112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1359747 + ... + 1375185.

It is an arithmetic number, because the mean of its divisors is an integer number (914480320).

Almost surely, 2^21112307574 is an apocalyptic number.

21112307574 is an abundant number, since it is smaller than the sum of its proper divisors (22782747786).

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

21112307574 is a wasteful number, since it uses less digits than its factorization.

21112307574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15773 (or 15744 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

Adding to 21112307574 its reverse (47570321112), we get a palindrome (68682628686).

The spelling of 21112307574 in words is "twenty-one billion, one hundred twelve million, three hundred seven thousand, five hundred seventy-four".