18994630 has 32 divisors (see below), whose sum is σ = 35831808. Its totient is φ = 7240800.

The previous prime is 18994609. The next prime is 18994643. The reversal of 18994630 is 3649981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21579 + ... + 22441.

It is an arithmetic number, because the mean of its divisors is an integer number (1119744).

Almost surely, 2^18994630 is an apocalyptic number.

18994630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18994630 is a deficient number, since it is larger than the sum of its proper divisors (16837178).

18994630 is a wasteful number, since it uses less digits than its factorization.

18994630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 18994630 is about 4358.2829187651. The cubic root of 18994630 is about 266.8150233511.

The spelling of 18994630 in words is "eighteen million, nine hundred ninety-four thousand, six hundred thirty".