18903423 has 64 divisors (see below), whose sum is σ = 34099200. Its totient is φ = 9020160.

The previous prime is 18903413. The next prime is 18903427. The reversal of 18903423 is 32430981.

It is not a de Polignac number, because 18903423 - 2⁴ = 18903407 is a prime.

It is a super-2 number, since 2×18903423² = 714678802233858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18903427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 258915 + ... + 258987.

It is an arithmetic number, because the mean of its divisors is an integer number (532800).

Almost surely, 2^18903423 is an apocalyptic number.

18903423 is a deficient number, since it is larger than the sum of its proper divisors (15195777).

18903423 is a wasteful number, since it uses less digits than its factorization.

18903423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 18903423 is about 4347.8066884350. The cubic root of 18903423 is about 266.3872804801.

The spelling of 18903423 in words is "eighteen million, nine hundred three thousand, four hundred twenty-three".