18998890375 has 16 divisors (see below), whose sum is σ = 23717378880. Its totient is φ = 15194776800.

The previous prime is 18998890367. The next prime is 18998890397. The reversal of 18998890375 is 57309889981.

It is not a de Polignac number, because 18998890375 - 2³ = 18998890367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18998890375.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 461121 + ... + 500629.

It is an arithmetic number, because the mean of its divisors is an integer number (1482336180).

Almost surely, 2^18998890375 is an apocalyptic number.

18998890375 is a deficient number, since it is larger than the sum of its proper divisors (4718488505).

18998890375 is an equidigital number, since it uses as much as digits as its factorization.

18998890375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43371 (or 43361 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 67.

The spelling of 18998890375 in words is "eighteen billion, nine hundred ninety-eight million, eight hundred ninety thousand, three hundred seventy-five".