21421585132 has 12 divisors (see below), whose sum is σ = 37496167576. Its totient is φ = 10708394400.

The previous prime is 21421585111. The next prime is 21421585177. The reversal of 21421585132 is 23158512412.

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, 579369 + ... + 615232.

Almost surely, 2^21421585132 is an apocalyptic number.

It is an amenable number.

21421585132 is a deficient number, since it is larger than the sum of its proper divisors (16074582444).

21421585132 is a wasteful number, since it uses less digits than its factorization.

21421585132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199088 (or 1199086 counting only the distinct ones).

The product of its digits is 19200, while the sum is 34.

The spelling of 21421585132 in words is "twenty-one billion, four hundred twenty-one million, five hundred eighty-five thousand, one hundred thirty-two".