18697494 has 16 divisors (see below), whose sum is σ = 37613232. Its totient is φ = 6196128.

The previous prime is 18697477. The next prime is 18697507. The reversal of 18697494 is 49479681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7969 + ... + 10044.

It is an arithmetic number, because the mean of its divisors is an integer number (2350827).

Almost surely, 2^18697494 is an apocalyptic number.

18697494 is an abundant number, since it is smaller than the sum of its proper divisors (18915738).

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

18697494 is a wasteful number, since it uses less digits than its factorization.

18697494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18191.

The product of its digits is 435456, while the sum is 48.

The square root of 18697494 is about 4324.0598978275. The cubic root of 18697494 is about 265.4164284548.

It can be divided in two parts, 18697 and 494, that added together give a palindrome (19191).

The spelling of 18697494 in words is "eighteen million, six hundred ninety-seven thousand, four hundred ninety-four".