18888900 has 72 divisors (see below), whose sum is σ = 55413120. Its totient is φ = 4967040.

The previous prime is 18888871. The next prime is 18888913. The reversal of 18888900 is 988881.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23302 + ... + 24098.

Almost surely, 2^18888900 is an apocalyptic number.

18888900 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 18888900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27706560).

18888900 is an abundant number, since it is smaller than the sum of its proper divisors (36524220).

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

18888900 is a wasteful number, since it uses less digits than its factorization.

18888900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893 (or 886 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 42.

The square root of 18888900 is about 4346.1362150766. The cubic root of 18888900 is about 266.3190435679.

The spelling of 18888900 in words is "eighteen million, eight hundred eighty-eight thousand, nine hundred".