18340023 has 16 divisors (see below), whose sum is σ = 26420576. Its totient is φ = 11249280.

The previous prime is 18340019. The next prime is 18340033. The reversal of 18340023 is 32004381.

It is a happy number.

It is not a de Polignac number, because 18340023 - 2² = 18340019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18340033) 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, 15861 + ... + 16977.

It is an arithmetic number, because the mean of its divisors is an integer number (1651286).

Almost surely, 2^18340023 is an apocalyptic number.

18340023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18340023 is a deficient number, since it is larger than the sum of its proper divisors (8080553).

18340023 is a wasteful number, since it uses less digits than its factorization.

18340023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1554.

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

The square root of 18340023 is about 4282.5253064051. The cubic root of 18340023 is about 263.7140642699.

The spelling of 18340023 in words is "eighteen million, three hundred forty thousand, twenty-three".