18696407 has 4 divisors (see below), whose sum is σ = 18767760. Its totient is φ = 18625056.

The previous prime is 18696397. The next prime is 18696421. The reversal of 18696407 is 70469681.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18696407 - 2¹⁸ = 18434263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18696427) 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 3 ways as a sum of consecutive naturals, for example, 35282 + ... + 35807.

It is an arithmetic number, because the mean of its divisors is an integer number (4691940).

Almost surely, 2^18696407 is an apocalyptic number.

18696407 is a deficient number, since it is larger than the sum of its proper divisors (71353).

18696407 is an equidigital number, since it uses as much as digits as its factorization.

18696407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71352.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 18696407 is about 4323.9342039397. The cubic root of 18696407 is about 265.4112849269.

The spelling of 18696407 in words is "eighteen million, six hundred ninety-six thousand, four hundred seven".