18612023 has 4 divisors (see below), whose sum is σ = 18646968. Its totient is φ = 18577080.

The previous prime is 18612019. The next prime is 18612029. The reversal of 18612023 is 32021681.

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

It is a cyclic number.

It is not a de Polignac number, because 18612023 - 2² = 18612019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18612023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18612029) 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, 16661 + ... + 17742.

It is an arithmetic number, because the mean of its divisors is an integer number (4661742).

Almost surely, 2^18612023 is an apocalyptic number.

18612023 is a deficient number, since it is larger than the sum of its proper divisors (34945).

18612023 is an equidigital number, since it uses as much as digits as its factorization.

18612023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34944.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 18612023 is about 4314.1653885775. The cubic root of 18612023 is about 265.0113819723.

The spelling of 18612023 in words is "eighteen million, six hundred twelve thousand, twenty-three".