18297023999 has 4 divisors (see below), whose sum is σ = 18300262920. Its totient is φ = 18293785080.

The previous prime is 18297023929. The next prime is 18297024013. The reversal of 18297023999 is 99932079281.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18297023999 - 2²⁴ = 18280246783 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 (18297023909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1610972 + ... + 1622289.

It is an arithmetic number, because the mean of its divisors is an integer number (4575065730).

Almost surely, 2^18297023999 is an apocalyptic number.

18297023999 is a deficient number, since it is larger than the sum of its proper divisors (3238921).

18297023999 is an equidigital number, since it uses as much as digits as its factorization.

18297023999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3238920.

The product of its (nonzero) digits is 4408992, while the sum is 59.

The spelling of 18297023999 in words is "eighteen billion, two hundred ninety-seven million, twenty-three thousand, nine hundred ninety-nine".