18690814 has 8 divisors (see below), whose sum is σ = 28054728. Its totient is φ = 9339240.

The previous prime is 18690811. The next prime is 18690817. The reversal of 18690814 is 41809681.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18690811) and next prime (18690817).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18690811) 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, 3609 + ... + 7099.

It is an arithmetic number, because the mean of its divisors is an integer number (3506841).

Almost surely, 2^18690814 is an apocalyptic number.

18690814 is a deficient number, since it is larger than the sum of its proper divisors (9363914).

18690814 is a wasteful number, since it uses less digits than its factorization.

18690814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6170.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 18690814 is about 4323.2874065923. The cubic root of 18690814 is about 265.3848165014.

The spelling of 18690814 in words is "eighteen million, six hundred ninety thousand, eight hundred fourteen".