18989255030 has 16 divisors (see below), whose sum is σ = 34333939584. Its totient is φ = 7561639680.

The previous prime is 18989255029. The next prime is 18989255053. The reversal of 18989255030 is 3055298981.

It is a self number, because there is not a number n which added to its sum of digits gives 18989255030.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4255451 + ... + 4259910.

It is an arithmetic number, because the mean of its divisors is an integer number (2145871224).

Almost surely, 2^18989255030 is an apocalyptic number.

18989255030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18989255030 is a deficient number, since it is larger than the sum of its proper divisors (15344684554).

18989255030 is a wasteful number, since it uses less digits than its factorization.

18989255030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8515591.

The product of its (nonzero) digits is 777600, while the sum is 50.

The spelling of 18989255030 in words is "eighteen billion, nine hundred eighty-nine million, two hundred fifty-five thousand, thirty".