18033394 has 12 divisors (see below), whose sum is σ = 28549854. Its totient is φ = 8541792.

The previous prime is 18033391. The next prime is 18033401. The reversal of 18033394 is 49333081.

It can be written as a sum of positive squares in only one way, i.e., 17952169 + 81225 = 4237^2 + 285^2 .

It is not an unprimeable number, because it can be changed into a prime (18033391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11767 + ... + 13210.

Almost surely, 2^18033394 is an apocalyptic number.

18033394 is a deficient number, since it is larger than the sum of its proper divisors (10516460).

18033394 is a wasteful number, since it uses less digits than its factorization.

18033394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25017 (or 24998 counting only the distinct ones).

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

The square root of 18033394 is about 4246.5743841360. The cubic root of 18033394 is about 262.2361078888.

The spelling of 18033394 in words is "eighteen million, thirty-three thousand, three hundred ninety-four".