18994930 has 16 divisors (see below), whose sum is σ = 34294104. Its totient is φ = 7575040.

The previous prime is 18994907. The next prime is 18994979. The reversal of 18994930 is 3949981.

It can be written as a sum of positive squares in 4 ways, for example, as 12938409 + 6056521 = 3597^2 + 2461^2 .

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 7 ways as a sum of consecutive naturals, for example, 840 + ... + 6220.

Almost surely, 2^18994930 is an apocalyptic number.

18994930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18994930 is a deficient number, since it is larger than the sum of its proper divisors (15299174).

18994930 is a wasteful number, since it uses less digits than its factorization.

18994930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5741.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 18994930 is about 4358.3173358534. The cubic root of 18994930 is about 266.8164280303.

The spelling of 18994930 in words is "eighteen million, nine hundred ninety-four thousand, nine hundred thirty".