18409023 has 12 divisors (see below), whose sum is σ = 26680368. Its totient is φ = 12231360.

The previous prime is 18408991. The next prime is 18409033. The reversal of 18409023 is 32090481.

It is not a de Polignac number, because 18409023 - 2⁵ = 18408991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18409033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 490 + ... + 6087.

It is an arithmetic number, because the mean of its divisors is an integer number (2223364).

Almost surely, 2^18409023 is an apocalyptic number.

18409023 is a deficient number, since it is larger than the sum of its proper divisors (8271345).

18409023 is a wasteful number, since it uses less digits than its factorization.

18409023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6894 (or 6891 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 18409023 is about 4290.5737378584. The cubic root of 18409023 is about 264.0443709856.

The spelling of 18409023 in words is "eighteen million, four hundred nine thousand, twenty-three".