22706264721 has 16 divisors (see below), whose sum is σ = 34658388864. Its totient is φ = 12953121024.

The previous prime is 22706264701. The next prime is 22706264729. The reversal of 22706264721 is 12746260722.

It is a happy number.

It is not a de Polignac number, because 22706264721 - 2⁵ = 22706264689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22706264721.

It is not an unprimeable number, because it can be changed into a prime (22706264729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 899226 + ... + 924131.

It is an arithmetic number, because the mean of its divisors is an integer number (2166149304).

Almost surely, 2^22706264721 is an apocalyptic number.

22706264721 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22706264721 is a deficient number, since it is larger than the sum of its proper divisors (11952124143).

22706264721 is a wasteful number, since it uses less digits than its factorization.

22706264721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823960.

The product of its (nonzero) digits is 112896, while the sum is 39.

The spelling of 22706264721 in words is "twenty-two billion, seven hundred six million, two hundred sixty-four thousand, seven hundred twenty-one".