18232903 has 16 divisors (see below), whose sum is σ = 20315680. Its totient is φ = 16353792.

The previous prime is 18232883. The next prime is 18232931. The reversal of 18232903 is 30923281.

It is not a de Polignac number, because 18232903 - 2⁹ = 18232391 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 (18232943) 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, 94375 + ... + 94567.

It is an arithmetic number, because the mean of its divisors is an integer number (1269730).

Almost surely, 2^18232903 is an apocalyptic number.

18232903 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18232903 is a deficient number, since it is larger than the sum of its proper divisors (2082777).

18232903 is an equidigital number, since it uses as much as digits as its factorization.

18232903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 18232903 is about 4270.0003512880. Note that the first 3 decimals coincide. The cubic root of 18232903 is about 263.1996296454.

The spelling of 18232903 in words is "eighteen million, two hundred thirty-two thousand, nine hundred three".