22507668938 has 4 divisors (see below), whose sum is σ = 33761503410. Its totient is φ = 11253834468.

The previous prime is 22507668929. The next prime is 22507668961. The reversal of 22507668938 is 83986670522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18997935889 + 3509733049 = 137833^2 + 59243^2 .

It is a super-2 number, since 2×22507668938² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5626917233 + ... + 5626917236.

Almost surely, 2^22507668938 is an apocalyptic number.

22507668938 is a deficient number, since it is larger than the sum of its proper divisors (11253834472).

22507668938 is a wasteful number, since it uses less digits than its factorization.

22507668938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11253834471.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 22507668938 in words is "twenty-two billion, five hundred seven million, six hundred sixty-eight thousand, nine hundred thirty-eight".