18447055807 has 2 divisors, whose sum is σ = 18447055808. Its totient is φ = 18447055806.

The previous prime is 18447055799. The next prime is 18447055813. The reversal of 18447055807 is 70855074481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18447055807 - 2³ = 18447055799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18447055867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9223527903 + 9223527904.

It is an arithmetic number, because the mean of its divisors is an integer number (9223527904).

Almost surely, 2^18447055807 is an apocalyptic number.

18447055807 is a deficient number, since it is larger than the sum of its proper divisors (1).

18447055807 is an equidigital number, since it uses as much as digits as its factorization.

18447055807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1254400, while the sum is 49.

The spelling of 18447055807 in words is "eighteen billion, four hundred forty-seven million, fifty-five thousand, eight hundred seven".