18226933 has 4 divisors (see below), whose sum is σ = 18431820. Its totient is φ = 18022048.

The previous prime is 18226927. The next prime is 18226951. The reversal of 18226933 is 33962281.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6441444 + 11785489 = 2538^2 + 3433^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18226933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18226433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102310 + ... + 102487.

It is an arithmetic number, because the mean of its divisors is an integer number (4607955).

Almost surely, 2^18226933 is an apocalyptic number.

It is an amenable number.

18226933 is a deficient number, since it is larger than the sum of its proper divisors (204887).

18226933 is an equidigital number, since it uses as much as digits as its factorization.

18226933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204886.

The product of its digits is 15552, while the sum is 34.

The square root of 18226933 is about 4269.3012308808. The cubic root of 18226933 is about 263.1709000218.

The spelling of 18226933 in words is "eighteen million, two hundred twenty-six thousand, nine hundred thirty-three".