18223023 has 16 divisors (see below), whose sum is σ = 29904896. Its totient is φ = 9612000.

The previous prime is 18223019. The next prime is 18223057. The reversal of 18223023 is 32032281.

It is not a de Polignac number, because 18223023 - 2² = 18223019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18223003) 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, 33103 + ... + 33648.

It is an arithmetic number, because the mean of its divisors is an integer number (1869056).

Almost surely, 2^18223023 is an apocalyptic number.

18223023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18223023 is a deficient number, since it is larger than the sum of its proper divisors (11681873).

18223023 is a wasteful number, since it uses less digits than its factorization.

18223023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66774.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 18223023 is about 4268.8432859500. The cubic root of 18223023 is about 263.1520804028.

The spelling of 18223023 in words is "eighteen million, two hundred twenty-three thousand, twenty-three".