21250406556332 has 12 divisors (see below), whose sum is σ = 37190146579320. Its totient is φ = 10624650390816.

The previous prime is 21250406556329. The next prime is 21250406556341. The reversal of 21250406556332 is 23365560405212.

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, 138135353 + ... + 138289104.

It is an arithmetic number, because the mean of its divisors is an integer number (3099178881610).

Almost surely, 2^{21250406556332} is an apocalyptic number.

It is an amenable number.

21250406556332 is a deficient number, since it is larger than the sum of its proper divisors (15939740022988).

21250406556332 is a wasteful number, since it uses less digits than its factorization.

21250406556332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276443680 (or 276443678 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 44.

The spelling of 21250406556332 in words is "twenty-one trillion, two hundred fifty billion, four hundred six million, five hundred fifty-six thousand, three hundred thirty-two".