18415250957 has 2 divisors, whose sum is σ = 18415250958. Its totient is φ = 18415250956.

The previous prime is 18415250951. The next prime is 18415251083. The reversal of 18415250957 is 75905251481.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18252280201 + 162970756 = 135101^2 + 12766^2 .

It is a cyclic number.

It is not a de Polignac number, because 18415250957 - 2⁴ = 18415250941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18415250951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9207625478 + 9207625479.

It is an arithmetic number, because the mean of its divisors is an integer number (9207625479).

Almost surely, 2^18415250957 is an apocalyptic number.

It is an amenable number.

18415250957 is a deficient number, since it is larger than the sum of its proper divisors (1).

18415250957 is an equidigital number, since it uses as much as digits as its factorization.

18415250957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504000, while the sum is 47.

The spelling of 18415250957 in words is "eighteen billion, four hundred fifteen million, two hundred fifty thousand, nine hundred fifty-seven".