18973023 has 12 divisors (see below), whose sum is σ = 26143704. Its totient is φ = 12238800.

The previous prime is 18972997. The next prime is 18973049. The reversal of 18973023 is 32037981.

It is an interprime number because it is at equal distance from previous prime (18972997) and next prime (18973049).

It is not a de Polignac number, because 18973023 - 2⁵ = 18972991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18973093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 408 + ... + 6173.

It is an arithmetic number, because the mean of its divisors is an integer number (2178642).

Almost surely, 2^18973023 is an apocalyptic number.

18973023 is a deficient number, since it is larger than the sum of its proper divisors (7170681).

18973023 is an equidigital number, since it uses as much as digits as its factorization.

18973023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6646 (or 6615 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 18973023 is about 4355.8033702177. The cubic root of 18973023 is about 266.7138147538.

The spelling of 18973023 in words is "eighteen million, nine hundred seventy-three thousand, twenty-three".