18620375089 has 2 divisors, whose sum is σ = 18620375090. Its totient is φ = 18620375088.

The previous prime is 18620375069. The next prime is 18620375099. The reversal of 18620375089 is 98057302681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17257288689 + 1363086400 = 131367^2 + 36920^2 .

It is a cyclic number.

It is not a de Polignac number, because 18620375089 - 2²⁵ = 18586820657 is a prime.

It is not a weakly prime, because it can be changed into another prime (18620375069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9310187544 + 9310187545.

It is an arithmetic number, because the mean of its divisors is an integer number (9310187545).

Almost surely, 2^18620375089 is an apocalyptic number.

It is an amenable number.

18620375089 is a deficient number, since it is larger than the sum of its proper divisors (1).

18620375089 is an equidigital number, since it uses as much as digits as its factorization.

18620375089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 18620375089 in words is "eighteen billion, six hundred twenty million, three hundred seventy-five thousand, eighty-nine".