18264994 has 16 divisors (see below), whose sum is σ = 30067200. Its totient is φ = 8252560.

The previous prime is 18264989. The next prime is 18264997. The reversal of 18264994 is 49946281.

It is a super-2 number, since 2×18264994² = 667220011640072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18264994.

It is not an unprimeable number, because it can be changed into a prime (18264997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1407 + ... + 6205.

It is an arithmetic number, because the mean of its divisors is an integer number (1879200).

Almost surely, 2^18264994 is an apocalyptic number.

18264994 is a deficient number, since it is larger than the sum of its proper divisors (11802206).

18264994 is a wasteful number, since it uses less digits than its factorization.

18264994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4985.

The product of its digits is 124416, while the sum is 43.

The square root of 18264994 is about 4273.7564273131. The cubic root of 18264994 is about 263.3539548379.

The spelling of 18264994 in words is "eighteen million, two hundred sixty-four thousand, nine hundred ninety-four".