22717951668 has 18 divisors (see below), whose sum is σ = 57425933474. Its totient is φ = 7572650544.

The previous prime is 22717951609. The next prime is 22717951679. The reversal of 22717951668 is 86615971722.

It can be written as a sum of positive squares in only one way, i.e., 21915249444 + 802702224 = 148038^2 + 28332^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×22717951668² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 315527071 + ... + 315527142.

Almost surely, 2^22717951668 is an apocalyptic number.

It is an amenable number.

22717951668 is an abundant number, since it is smaller than the sum of its proper divisors (34707981806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22717951668 is a wasteful number, since it uses less digits than its factorization.

22717951668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631054223 (or 631054218 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The spelling of 22717951668 in words is "twenty-two billion, seven hundred seventeen million, nine hundred fifty-one thousand, six hundred sixty-eight".