21632131604 has 12 divisors (see below), whose sum is σ = 38736608064. Its totient is φ = 10564529304.

The previous prime is 21632131601. The next prime is 21632131663. The reversal of 21632131604 is 40613123612.

It is a super-2 number, since 2×21632131604² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21632131601) 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, 62883932 + ... + 62884275.

It is an arithmetic number, because the mean of its divisors is an integer number (3228050672).

Almost surely, 2^21632131604 is an apocalyptic number.

It is an amenable number.

21632131604 is a deficient number, since it is larger than the sum of its proper divisors (17104476460).

21632131604 is a wasteful number, since it uses less digits than its factorization.

21632131604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125768254 (or 125768252 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 21632131604 in words is "twenty-one billion, six hundred thirty-two million, one hundred thirty-one thousand, six hundred four".