18516494 has 8 divisors (see below), whose sum is σ = 28126560. Its totient is φ = 9140976.

The previous prime is 18516479. The next prime is 18516499. The reversal of 18516494 is 49461581.

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 (18516499) 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, 58439 + ... + 58754.

It is an arithmetic number, because the mean of its divisors is an integer number (3515820).

Almost surely, 2^18516494 is an apocalyptic number.

18516494 is a deficient number, since it is larger than the sum of its proper divisors (9610066).

18516494 is a wasteful number, since it uses less digits than its factorization.

18516494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117274.

The product of its digits is 34560, while the sum is 38.

The square root of 18516494 is about 4303.0795948948. The cubic root of 18516494 is about 264.5572004749.

The spelling of 18516494 in words is "eighteen million, five hundred sixteen thousand, four hundred ninety-four".