18313366 has 4 divisors (see below), whose sum is σ = 27470052. Its totient is φ = 9156682.

The previous prime is 18313331. The next prime is 18313381. The reversal of 18313366 is 66331381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66331381 = 29 ⋅2287289.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4578340 + ... + 4578343.

It is an arithmetic number, because the mean of its divisors is an integer number (6867513).

Almost surely, 2^18313366 is an apocalyptic number.

18313366 is a deficient number, since it is larger than the sum of its proper divisors (9156686).

18313366 is an equidigital number, since it uses as much as digits as its factorization.

18313366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9156685.

The product of its digits is 7776, while the sum is 31.

The square root of 18313366 is about 4279.4118754801. The cubic root of 18313366 is about 263.5862339233.

The spelling of 18313366 in words is "eighteen million, three hundred thirteen thousand, three hundred sixty-six".