21629642731632 has 120 divisors (see below), whose sum is σ = 65190858347888. Its totient is φ = 6655119667200.

The previous prime is 21629642731603. The next prime is 21629642731633. The reversal of 21629642731632 is 23613724692612.

21629642731632 is a `hidden beast` number, since 2 + 1 + 6 + 296 + 4 + 2 + 7 + 316 + 32 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21629642731633) 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, 100252032 + ... + 100467552.

Almost surely, 2^{21629642731632} is an apocalyptic number.

It is an amenable number.

21629642731632 is an abundant number, since it is smaller than the sum of its proper divisors (43561215616256).

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

21629642731632 is a wasteful number, since it uses less digits than its factorization.

21629642731632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269159 (or 269150 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 54.

The spelling of 21629642731632 in words is "twenty-one trillion, six hundred twenty-nine billion, six hundred forty-two million, seven hundred thirty-one thousand, six hundred thirty-two".