22507668731 has 2 divisors, whose sum is σ = 22507668732. Its totient is φ = 22507668730.

The previous prime is 22507668713. The next prime is 22507668767. The reversal of 22507668731 is 13786670522.

Together with previous prime (22507668713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22507668731 is a prime.

It is a super-2 number, since 2×22507668731² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (22507668791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11253834365 + 11253834366.

It is an arithmetic number, because the mean of its divisors is an integer number (11253834366).

Almost surely, 2^22507668731 is an apocalyptic number.

22507668731 is a deficient number, since it is larger than the sum of its proper divisors (1).

22507668731 is an equidigital number, since it uses as much as digits as its factorization.

22507668731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 22507668731 in words is "twenty-two billion, five hundred seven million, six hundred sixty-eight thousand, seven hundred thirty-one".