18693404 has 24 divisors (see below), whose sum is σ = 35380800. Its totient is φ = 8608256.

The previous prime is 18693373. The next prime is 18693413. The reversal of 18693404 is 40439681.

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 7 ways as a sum of consecutive naturals, for example, 272 + ... + 6120.

It is an arithmetic number, because the mean of its divisors is an integer number (1474200).

Almost surely, 2^18693404 is an apocalyptic number.

It is an amenable number.

18693404 is a deficient number, since it is larger than the sum of its proper divisors (16687396).

18693404 is a wasteful number, since it uses less digits than its factorization.

18693404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5917 (or 5915 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 18693404 is about 4323.5869367922. The cubic root of 18693404 is about 265.3970741258.

The spelling of 18693404 in words is "eighteen million, six hundred ninety-three thousand, four hundred four".