21772220452 has 12 divisors (see below), whose sum is σ = 39330462976. Its totient is φ = 10534945320.

The previous prime is 21772220387. The next prime is 21772220471. The reversal of 21772220452 is 25402227712.

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, 87791088 + ... + 87791335.

Almost surely, 2^21772220452 is an apocalyptic number.

It is an amenable number.

21772220452 is a deficient number, since it is larger than the sum of its proper divisors (17558242524).

21772220452 is a wasteful number, since it uses less digits than its factorization.

21772220452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175582458 (or 175582456 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 34.

The spelling of 21772220452 in words is "twenty-one billion, seven hundred seventy-two million, two hundred twenty thousand, four hundred fifty-two".