18690084 has 36 divisors (see below), whose sum is σ = 53994304. Its totient is φ = 5339952.

The previous prime is 18690059. The next prime is 18690097. The reversal of 18690084 is 48009681.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36832 + ... + 37335.

Almost surely, 2^18690084 is an apocalyptic number.

18690084 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18690084 is an abundant number, since it is smaller than the sum of its proper divisors (35304220).

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

18690084 is a wasteful number, since it uses less digits than its factorization.

18690084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74184 (or 74179 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 18690084 is about 4323.2029792736. The cubic root of 18690084 is about 265.3813614452.

The spelling of 18690084 in words is "eighteen million, six hundred ninety thousand, eighty-four".