18712168 has 8 divisors (see below), whose sum is σ = 35085330. Its totient is φ = 9356080.

The previous prime is 18712147. The next prime is 18712201. The reversal of 18712168 is 86121781.

It can be written as a sum of positive squares in only one way, i.e., 16016004 + 2696164 = 4002^2 + 1642^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1169503 + ... + 1169518.

Almost surely, 2^18712168 is an apocalyptic number.

It is an amenable number.

18712168 is a deficient number, since it is larger than the sum of its proper divisors (16373162).

18712168 is a wasteful number, since it uses less digits than its factorization.

18712168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2339027 (or 2339023 counting only the distinct ones).

The product of its digits is 5376, while the sum is 34.

The square root of 18712168 is about 4325.7563500502. The cubic root of 18712168 is about 265.4858442144.

The spelling of 18712168 in words is "eighteen million, seven hundred twelve thousand, one hundred sixty-eight".