18223093 has 4 divisors (see below), whose sum is σ = 20826400. Its totient is φ = 15619788.

The previous prime is 18223087. The next prime is 18223097. The reversal of 18223093 is 39032281.

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 a de Polignac number, because none of the positive numbers 2^k-18223093 is a prime.

It is a super-2 number, since 2×18223093² = 664162236973298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18223097) 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, 1301643 + ... + 1301656.

It is an arithmetic number, because the mean of its divisors is an integer number (5206600).

Almost surely, 2^18223093 is an apocalyptic number.

It is an amenable number.

18223093 is a deficient number, since it is larger than the sum of its proper divisors (2603307).

18223093 is an equidigital number, since it uses as much as digits as its factorization.

18223093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2603306.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 18223093 is about 4268.8514848844. The cubic root of 18223093 is about 263.1524173506.

The spelling of 18223093 in words is "eighteen million, two hundred twenty-three thousand, ninety-three".