18858680 has 16 divisors (see below), whose sum is σ = 42432120. Its totient is φ = 7543456.

The previous prime is 18858677. The next prime is 18858713. The reversal of 18858680 is 8685881.

It is a super-2 number, since 2×18858680² = 711299622684800, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 235694 + ... + 235773.

Almost surely, 2^18858680 is an apocalyptic number.

18858680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18858680 is an abundant number, since it is smaller than the sum of its proper divisors (23573440).

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

18858680 is a wasteful number, since it uses less digits than its factorization.

18858680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471478 (or 471474 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 44.

The square root of 18858680 is about 4342.6581721337. The cubic root of 18858680 is about 266.1769414629.

The spelling of 18858680 in words is "eighteen million, eight hundred fifty-eight thousand, six hundred eighty".