18508023 has 12 divisors (see below), whose sum is σ = 27596608. Its totient is φ = 11940480.

The previous prime is 18508001. The next prime is 18508027. The reversal of 18508023 is 32080581.

It is a happy number.

It is not a de Polignac number, because 18508023 - 2¹⁴ = 18491639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18508027) 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, 32890 + ... + 33447.

Almost surely, 2^18508023 is an apocalyptic number.

18508023 is a deficient number, since it is larger than the sum of its proper divisors (9088585).

18508023 is a wasteful number, since it uses less digits than its factorization.

18508023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66374 (or 66371 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 18508023 is about 4302.0951872314. The cubic root of 18508023 is about 264.5168507578.

The spelling of 18508023 in words is "eighteen million, five hundred eight thousand, twenty-three".