22657193921 has 8 divisors (see below), whose sum is σ = 24817210920. Its totient is φ = 20589092608.

The previous prime is 22657193861. The next prime is 22657193987. The reversal of 22657193921 is 12939175622.

It can be written as a sum of positive squares in 4 ways, for example, as 2326711696 + 20330482225 = 48236^2 + 142585^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22657193921 - 2⁶ = 22657193857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22657193521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22978406 + ... + 22979391.

It is an arithmetic number, because the mean of its divisors is an integer number (3102151365).

Almost surely, 2^22657193921 is an apocalyptic number.

It is an amenable number.

22657193921 is a deficient number, since it is larger than the sum of its proper divisors (2160016999).

22657193921 is a wasteful number, since it uses less digits than its factorization.

22657193921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45957843.

The product of its digits is 408240, while the sum is 47.

The spelling of 22657193921 in words is "twenty-two billion, six hundred fifty-seven million, one hundred ninety-three thousand, nine hundred twenty-one".