18955233 has 12 divisors (see below), whose sum is σ = 29869008. Its totient is φ = 11487960.

The previous prime is 18955213. The next prime is 18955247. The reversal of 18955233 is 33255981.

It is not a de Polignac number, because 18955233 - 2⁶ = 18955169 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18955213) 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, 95635 + ... + 95832.

It is an arithmetic number, because the mean of its divisors is an integer number (2489084).

Almost surely, 2^18955233 is an apocalyptic number.

It is an amenable number.

18955233 is a deficient number, since it is larger than the sum of its proper divisors (10913775).

18955233 is a wasteful number, since it uses less digits than its factorization.

18955233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191484 (or 191481 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 18955233 is about 4353.7607881003. The cubic root of 18955233 is about 266.6304275407.

The spelling of 18955233 in words is "eighteen million, nine hundred fifty-five thousand, two hundred thirty-three".