18709684 has 12 divisors (see below), whose sum is σ = 37419424. Its totient is φ = 8018424.

The previous prime is 18709643. The next prime is 18709693. The reversal of 18709684 is 48690781.

18709684 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 18709684.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334074 + ... + 334129.

Almost surely, 2^18709684 is an apocalyptic number.

18709684 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18709684 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18709684 is a wasteful number, since it uses less digits than its factorization.

18709684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668214 (or 668212 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 18709684 is about 4325.4692231017. The cubic root of 18709684 is about 265.4740961365.

The spelling of 18709684 in words is "eighteen million, seven hundred nine thousand, six hundred eighty-four".