18042423207 has 4 divisors (see below), whose sum is σ = 24056564280. Its totient is φ = 12028282136.

The previous prime is 18042423193. The next prime is 18042423247. The reversal of 18042423207 is 70232424081.

It is a happy number.

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 18042423207 - 2¹² = 18042419111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18042423247) 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, 3007070532 + ... + 3007070537.

It is an arithmetic number, because the mean of its divisors is an integer number (6014141070).

Almost surely, 2^18042423207 is an apocalyptic number.

18042423207 is a deficient number, since it is larger than the sum of its proper divisors (6014141073).

18042423207 is an equidigital number, since it uses as much as digits as its factorization.

18042423207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6014141072.

The product of its (nonzero) digits is 21504, while the sum is 33.

Adding to 18042423207 its reverse (70232424081), we get a palindrome (88274847288).

The spelling of 18042423207 in words is "eighteen billion, forty-two million, four hundred twenty-three thousand, two hundred seven".