21131632574 has 48 divisors (see below), whose sum is σ = 34844880672. Its totient is φ = 9605965824.

The previous prime is 21131632573. The next prime is 21131632633. The reversal of 21131632574 is 47523613112.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131632573) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6376742 + ... + 6380054.

It is an arithmetic number, because the mean of its divisors is an integer number (725935014).

Almost surely, 2^21131632574 is an apocalyptic number.

21131632574 is a deficient number, since it is larger than the sum of its proper divisors (13713248098).

21131632574 is a wasteful number, since it uses less digits than its factorization.

21131632574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3621 (or 3608 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The spelling of 21131632574 in words is "twenty-one billion, one hundred thirty-one million, six hundred thirty-two thousand, five hundred seventy-four".