23356140637 has 2 divisors, whose sum is σ = 23356140638. Its totient is φ = 23356140636.

The previous prime is 23356140581. The next prime is 23356140667. The reversal of 23356140637 is 73604165332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18761876676 + 4594263961 = 136974^2 + 67781^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23356140637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23356140637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23356140667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11678070318 + 11678070319.

It is an arithmetic number, because the mean of its divisors is an integer number (11678070319).

Almost surely, 2^23356140637 is an apocalyptic number.

It is an amenable number.

23356140637 is a deficient number, since it is larger than the sum of its proper divisors (1).

23356140637 is an equidigital number, since it uses as much as digits as its factorization.

23356140637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 40.

The spelling of 23356140637 in words is "twenty-three billion, three hundred fifty-six million, one hundred forty thousand, six hundred thirty-seven".