18166244933 has 4 divisors (see below), whose sum is σ = 18171941088. Its totient is φ = 18160548780.

The previous prime is 18166244891. The next prime is 18166244969. The reversal of 18166244933 is 33944266181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18166244933 - 2²² = 18162050629 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 (18166244233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2843291 + ... + 2849672.

It is an arithmetic number, because the mean of its divisors is an integer number (4542985272).

Almost surely, 2^18166244933 is an apocalyptic number.

It is an amenable number.

18166244933 is a deficient number, since it is larger than the sum of its proper divisors (5696155).

18166244933 is an equidigital number, since it uses as much as digits as its factorization.

18166244933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5696154.

The product of its digits is 746496, while the sum is 47.

The spelling of 18166244933 in words is "eighteen billion, one hundred sixty-six million, two hundred forty-four thousand, nine hundred thirty-three".