18693996 has 12 divisors (see below), whose sum is σ = 43619352. Its totient is φ = 6231328.

The previous prime is 18693979. The next prime is 18694031. The reversal of 18693996 is 69939681.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 778905 + ... + 778928.

It is an arithmetic number, because the mean of its divisors is an integer number (3634946).

Almost surely, 2^18693996 is an apocalyptic number.

It is an amenable number.

18693996 is an abundant number, since it is smaller than the sum of its proper divisors (24925356).

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

18693996 is a wasteful number, since it uses less digits than its factorization.

18693996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557840 (or 1557838 counting only the distinct ones).

The product of its digits is 629856, while the sum is 51.

The square root of 18693996 is about 4323.6553979243. The cubic root of 18693996 is about 265.3998757095.

The spelling of 18693996 in words is "eighteen million, six hundred ninety-three thousand, nine hundred ninety-six".