22318675921 has 2 divisors, whose sum is σ = 22318675922. Its totient is φ = 22318675920.

The previous prime is 22318675903. The next prime is 22318675969. The reversal of 22318675921 is 12957681322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16669650321 + 5649025600 = 129111^2 + 75160^2 .

It is a cyclic number.

It is not a de Polignac number, because 22318675921 - 2¹⁵ = 22318643153 is a prime.

It is a super-3 number, since 3×22318675921³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (22318675321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11159337960 + 11159337961.

It is an arithmetic number, because the mean of its divisors is an integer number (11159337961).

Almost surely, 2^22318675921 is an apocalyptic number.

It is an amenable number.

22318675921 is a deficient number, since it is larger than the sum of its proper divisors (1).

22318675921 is an equidigital number, since it uses as much as digits as its factorization.

22318675921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 46.

The spelling of 22318675921 in words is "twenty-two billion, three hundred eighteen million, six hundred seventy-five thousand, nine hundred twenty-one".