21622136144772 has 48 divisors (see below), whose sum is σ = 50477705550272. Its totient is φ = 7203657628800.

The previous prime is 21622136144743. The next prime is 21622136144797. The reversal of 21622136144772 is 27744163122612.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186177522 + ... + 186293622.

Almost surely, 2^{21622136144772} is an apocalyptic number.

It is an amenable number.

21622136144772 is an abundant number, since it is smaller than the sum of its proper divisors (28855569405500).

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

21622136144772 is a wasteful number, since it uses less digits than its factorization.

21622136144772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123988 (or 123986 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 48.

The spelling of 21622136144772 in words is "twenty-one trillion, six hundred twenty-two billion, one hundred thirty-six million, one hundred forty-four thousand, seven hundred seventy-two".