18685707 has 16 divisors (see below), whose sum is σ = 25498368. Its totient is φ = 12168800.

The previous prime is 18685673. The next prime is 18685717. The reversal of 18685707 is 70758681.

It is a cyclic number.

It is not a de Polignac number, because 18685707 - 2⁸ = 18685451 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18685717) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 24778 + ... + 25520.

It is an arithmetic number, because the mean of its divisors is an integer number (1593648).

Almost surely, 2^18685707 is an apocalyptic number.

18685707 is a deficient number, since it is larger than the sum of its proper divisors (6812661).

18685707 is a wasteful number, since it uses less digits than its factorization.

18685707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930.

The product of its (nonzero) digits is 94080, while the sum is 42.

The square root of 18685707 is about 4322.6967277384. The cubic root of 18685707 is about 265.3606434198.

The spelling of 18685707 in words is "eighteen million, six hundred eighty-five thousand, seven hundred seven".