21621404632132 has 12 divisors (see below), whose sum is σ = 37849589406720. Its totient is φ = 10807236230216.

The previous prime is 21621404632099. The next prime is 21621404632153. The reversal of 21621404632132 is 23123640412612.

It is a junction number, because it is equal to n+sod(n) for n = 21621404632091 and 21621404632100.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 866507428 + ... + 866532379.

It is an arithmetic number, because the mean of its divisors is an integer number (3154132450560).

Almost surely, 2^{21621404632132} is an apocalyptic number.

It is an amenable number.

21621404632132 is a deficient number, since it is larger than the sum of its proper divisors (16228184774588).

21621404632132 is a wasteful number, since it uses less digits than its factorization.

21621404632132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733042930 (or 1733042928 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 21621404632132 in words is "twenty-one trillion, six hundred twenty-one billion, four hundred four million, six hundred thirty-two thousand, one hundred thirty-two".