18426623 has 8 divisors (see below), whose sum is σ = 19578528. Its totient is φ = 17282304.

The previous prime is 18426607. The next prime is 18426659. The reversal of 18426623 is 32662481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18426623 - 2⁴ = 18426607 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 18426623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18426673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3590 + ... + 7052.

It is an arithmetic number, because the mean of its divisors is an integer number (2447316).

Almost surely, 2^18426623 is an apocalyptic number.

18426623 is a deficient number, since it is larger than the sum of its proper divisors (1151905).

18426623 is a wasteful number, since it uses less digits than its factorization.

18426623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3793.

The product of its digits is 13824, while the sum is 32.

The square root of 18426623 is about 4292.6242556273. The cubic root of 18426623 is about 264.1284909799.

The spelling of 18426623 in words is "eighteen million, four hundred twenty-six thousand, six hundred twenty-three".