18680984 has 16 divisors (see below), whose sum is σ = 40030800. Its totient is φ = 8006112.

The previous prime is 18680929. The next prime is 18680989. The reversal of 18680984 is 48908681.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18680989) 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, 166739 + ... + 166850.

It is an arithmetic number, because the mean of its divisors is an integer number (2501925).

Almost surely, 2^18680984 is an apocalyptic number.

18680984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18680984 is an abundant number, since it is smaller than the sum of its proper divisors (21349816).

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

18680984 is a wasteful number, since it uses less digits than its factorization.

18680984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333602 (or 333598 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 18680984 is about 4322.1503907199. The cubic root of 18680984 is about 265.3382840138.

The spelling of 18680984 in words is "eighteen million, six hundred eighty thousand, nine hundred eighty-four".