18996680 has 16 divisors (see below), whose sum is σ = 42742620. Its totient is φ = 7598656.

The previous prime is 18996671. The next prime is 18996683. The reversal of 18996680 is 8669981.

18996680 = T₁₅₈₄ + T₁₅₈₅ + ... + T₁₅₉₈.

It can be written as a sum of positive squares in 2 ways, for example, as 17322244 + 1674436 = 4162^2 + 1294^2 .

It is not an unprimeable number, because it can be changed into a prime (18996683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237419 + ... + 237498.

Almost surely, 2^18996680 is an apocalyptic number.

18996680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18996680 is an abundant number, since it is smaller than the sum of its proper divisors (23745940).

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

18996680 is a wasteful number, since it uses less digits than its factorization.

18996680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474928 (or 474924 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 18996680 is about 4358.5180967847. The cubic root of 18996680 is about 266.8246216976.

It can be divided in two parts, 189 and 96680, that added together give a palindrome (96869).

The spelling of 18996680 in words is "eighteen million, nine hundred ninety-six thousand, six hundred eighty".