21621223632532 has 24 divisors (see below), whose sum is σ = 37907515804032. Its totient is φ = 10790512884000.

The previous prime is 21621223632511. The next prime is 21621223632563. The reversal of 21621223632532 is 23523632212612.

It is a super-2 number, since 2×21621223632532² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9762657 + ... + 11770807.

It is an arithmetic number, because the mean of its divisors is an integer number (1579479825168).

Almost surely, 2^{21621223632532} is an apocalyptic number.

It is an amenable number.

21621223632532 is a deficient number, since it is larger than the sum of its proper divisors (16286292171500).

21621223632532 is a wasteful number, since it uses less digits than its factorization.

21621223632532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2013159 (or 2013157 counting only the distinct ones).

The product of its digits is 311040, while the sum is 40.

The spelling of 21621223632532 in words is "twenty-one trillion, six hundred twenty-one billion, two hundred twenty-three million, six hundred thirty-two thousand, five hundred thirty-two".