18487297023 has 32 divisors (see below), whose sum is σ = 27019937280. Its totient is φ = 11174163840.

The previous prime is 18487297007. The next prime is 18487297057. The reversal of 18487297023 is 32079278481.

It is a Cunningham number, because it is equal to 135968²-1.

It is not a de Polignac number, because 18487297023 - 2⁴ = 18487297007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18487297093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1762368 + ... + 1772826.

It is an arithmetic number, because the mean of its divisors is an integer number (844373040).

Almost surely, 2^18487297023 is an apocalyptic number.

18487297023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18487297023 is a deficient number, since it is larger than the sum of its proper divisors (8532640257).

18487297023 is a wasteful number, since it uses less digits than its factorization.

18487297023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11279.

The product of its (nonzero) digits is 1354752, while the sum is 51.

The spelling of 18487297023 in words is "eighteen billion, four hundred eighty-seven million, two hundred ninety-seven thousand, twenty-three".