22913675721 has 24 divisors (see below), whose sum is σ = 35164214280. Its totient is φ = 14350404096.

The previous prime is 22913675693. The next prime is 22913675731. The reversal of 22913675721 is 12757631922.

It is a happy number.

22913675721 is a `hidden beast` number, since 2 + 2 + 9 + 13 + 67 + 572 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 11192582025 + 11721093696 = 105795^2 + 108264^2 .

It is not a de Polignac number, because 22913675721 - 2⁹ = 22913675209 is a prime.

It is a super-3 number, since 3×22913675721³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22913675731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1176720 + ... + 1196033.

It is an arithmetic number, because the mean of its divisors is an integer number (1465175595).

Almost surely, 2^22913675721 is an apocalyptic number.

It is an amenable number.

22913675721 is a deficient number, since it is larger than the sum of its proper divisors (12250538559).

22913675721 is a wasteful number, since it uses less digits than its factorization.

22913675721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2372825 (or 2372822 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The spelling of 22913675721 in words is "twenty-two billion, nine hundred thirteen million, six hundred seventy-five thousand, seven hundred twenty-one".