18306994 has 24 divisors (see below), whose sum is σ = 30724560. Its totient is φ = 8156736.

The previous prime is 18306991. The next prime is 18306997. The reversal of 18306994 is 49960381.

It is an interprime number because it is at equal distance from previous prime (18306991) and next prime (18306997).

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18306991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10149 + ... + 11815.

It is an arithmetic number, because the mean of its divisors is an integer number (1280190).

Almost surely, 2^18306994 is an apocalyptic number.

18306994 is a deficient number, since it is larger than the sum of its proper divisors (12417566).

18306994 is a wasteful number, since it uses less digits than its factorization.

18306994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722 (or 1705 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 18306994 is about 4278.6673158824. The cubic root of 18306994 is about 263.5556594180. Note that the first 3 decimals are identical.

The spelling of 18306994 in words is "eighteen million, three hundred six thousand, nine hundred ninety-four".