18900417897 has 12 divisors (see below), whose sum is σ = 27881468160. Its totient is φ = 12332187288.

The previous prime is 18900417883. The next prime is 18900417919. The reversal of 18900417897 is 79871400981.

It is not a de Polignac number, because 18900417897 - 2¹⁸ = 18900155753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18900417847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22340497 + ... + 22341342.

It is an arithmetic number, because the mean of its divisors is an integer number (2323455680).

Almost surely, 2^18900417897 is an apocalyptic number.

It is an amenable number.

18900417897 is a deficient number, since it is larger than the sum of its proper divisors (8981050263).

18900417897 is a wasteful number, since it uses less digits than its factorization.

18900417897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44681892 (or 44681889 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 54.

The spelling of 18900417897 in words is "eighteen billion, nine hundred million, four hundred seventeen thousand, eight hundred ninety-seven".