18447055937 has 2 divisors, whose sum is σ = 18447055938. Its totient is φ = 18447055936.

The previous prime is 18447055877. The next prime is 18447055961. The reversal of 18447055937 is 73955074481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13605122881 + 4841933056 = 116641^2 + 69584^2 .

It is a cyclic number.

It is not a de Polignac number, because 18447055937 - 2¹² = 18447051841 is a prime.

It is not a weakly prime, because it can be changed into another prime (18447055967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9223527968 + 9223527969.

It is an arithmetic number, because the mean of its divisors is an integer number (9223527969).

Almost surely, 2^18447055937 is an apocalyptic number.

It is an amenable number.

18447055937 is a deficient number, since it is larger than the sum of its proper divisors (1).

18447055937 is an equidigital number, since it uses as much as digits as its factorization.

18447055937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4233600, while the sum is 53.

The spelling of 18447055937 in words is "eighteen billion, four hundred forty-seven million, fifty-five thousand, nine hundred thirty-seven".