22720475765 has 24 divisors (see below), whose sum is σ = 29799210528. Its totient is φ = 16621325760.

The previous prime is 22720475759. The next prime is 22720475783. The reversal of 22720475765 is 56757402722.

It is not a de Polignac number, because 22720475765 - 2¹⁰ = 22720474741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35231 + ... + 216060.

It is an arithmetic number, because the mean of its divisors is an integer number (1241633772).

Almost surely, 2^22720475765 is an apocalyptic number.

It is an amenable number.

22720475765 is a deficient number, since it is larger than the sum of its proper divisors (7078734763).

22720475765 is a wasteful number, since it uses less digits than its factorization.

22720475765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251429 (or 251416 counting only the distinct ones).

The product of its (nonzero) digits is 1646400, while the sum is 47.

The spelling of 22720475765 in words is "twenty-two billion, seven hundred twenty million, four hundred seventy-five thousand, seven hundred sixty-five".