18994500 has 240 divisors, whose sum is σ = 71879808. Its totient is φ = 4276800.

The previous prime is 18994499. The next prime is 18994529. The reversal of 18994500 is 549981.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 283467 + ... + 283533.

Almost surely, 2^18994500 is an apocalyptic number.

18994500 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 18994500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35939904).

18994500 is an abundant number, since it is smaller than the sum of its proper divisors (52885308).

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

18994500 is a wasteful number, since it uses less digits than its factorization.

18994500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 18994500 is about 4358.2680046092. The cubic root of 18994500 is about 266.8144146522.

The spelling of 18994500 in words is "eighteen million, nine hundred ninety-four thousand, five hundred".