18988700 has 18 divisors (see below), whose sum is σ = 41205696. Its totient is φ = 7595440.

The previous prime is 18988693. The next prime is 18988721. The reversal of 18988700 is 788981.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 94844 + ... + 95043.

Almost surely, 2^18988700 is an apocalyptic number.

18988700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18988700 is an abundant number, since it is smaller than the sum of its proper divisors (22216996).

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

18988700 is a wasteful number, since it uses less digits than its factorization.

18988700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189901 (or 189894 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 41.

The square root of 18988700 is about 4357.6025518627. The cubic root of 18988700 is about 266.7872544892.

The spelling of 18988700 in words is "eighteen million, nine hundred eighty-eight thousand, seven hundred".