18838600920 has 160 divisors (see below), whose sum is σ = 63485650800. Its totient is φ = 5010377472.

The previous prime is 18838600889. The next prime is 18838600933. The reversal of 18838600920 is 2900683881.

18838600920 is a `hidden beast` number, since 1 + 8 + 8 + 38 + 600 + 9 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1252887 + ... + 1267833.

Almost surely, 2^18838600920 is an apocalyptic number.

18838600920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18838600920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31742825400).

18838600920 is an abundant number, since it is smaller than the sum of its proper divisors (44647049880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18838600920 is a wasteful number, since it uses less digits than its factorization.

18838600920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15359 (or 15346 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 18838600920 in words is "eighteen billion, eight hundred thirty-eight million, six hundred thousand, nine hundred twenty".