23437573513 has 2 divisors, whose sum is σ = 23437573514. Its totient is φ = 23437573512.

The previous prime is 23437573477. The next prime is 23437573517. The reversal of 23437573513 is 31537573432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22908941449 + 528632064 = 151357^2 + 22992^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23437573513 is a prime.

It is a super-2 number, since 2×23437573513² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23437573513.

It is not a weakly prime, because it can be changed into another prime (23437573517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11718786756 + 11718786757.

It is an arithmetic number, because the mean of its divisors is an integer number (11718786757).

Almost surely, 2^23437573513 is an apocalyptic number.

It is an amenable number.

23437573513 is a deficient number, since it is larger than the sum of its proper divisors (1).

23437573513 is an equidigital number, since it uses as much as digits as its factorization.

23437573513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 793800, while the sum is 43.

The spelling of 23437573513 in words is "twenty-three billion, four hundred thirty-seven million, five hundred seventy-three thousand, five hundred thirteen".