18494231 has 16 divisors (see below), whose sum is σ = 22185984. Its totient is φ = 15073344.

The previous prime is 18494221. The next prime is 18494233. The reversal of 18494231 is 13249481.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18494231 - 2⁶ = 18494167 is a prime.

It is a super-2 number, since 2×18494231² = 684073160562722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18494233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50210 + ... + 50576.

It is an arithmetic number, because the mean of its divisors is an integer number (1386624).

Almost surely, 2^18494231 is an apocalyptic number.

18494231 is a deficient number, since it is larger than the sum of its proper divisors (3691753).

18494231 is a wasteful number, since it uses less digits than its factorization.

18494231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710.

The product of its digits is 6912, while the sum is 32.

The square root of 18494231 is about 4300.4919486031. The cubic root of 18494231 is about 264.4511292959.

The spelling of 18494231 in words is "eighteen million, four hundred ninety-four thousand, two hundred thirty-one".