18283994 has 16 divisors (see below), whose sum is σ = 28324896. Its totient is φ = 8845200.

The previous prime is 18283973. The next prime is 18284003. The reversal of 18283994 is 49938281.

18283994 = 183² + 184² + ... + 393².

It is a happy 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, 15029 + ... + 16199.

It is an arithmetic number, because the mean of its divisors is an integer number (1770306).

Almost surely, 2^18283994 is an apocalyptic number.

18283994 is a deficient number, since it is larger than the sum of its proper divisors (10040902).

18283994 is a wasteful number, since it uses less digits than its factorization.

18283994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421.

The product of its digits is 124416, while the sum is 44.

The square root of 18283994 is about 4275.9787183755. The cubic root of 18283994 is about 263.4452404071.

The spelling of 18283994 in words is "eighteen million, two hundred eighty-three thousand, nine hundred ninety-four".