18107231039 has 4 divisors (see below), whose sum is σ = 18414133320. Its totient is φ = 17800328760.

The previous prime is 18107231027. The next prime is 18107231101. The reversal of 18107231039 is 93013270181.

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 18107231039 - 2⁸ = 18107230783 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 (18107231339) 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, 153451052 + ... + 153451169.

It is an arithmetic number, because the mean of its divisors is an integer number (4603533330).

Almost surely, 2^18107231039 is an apocalyptic number.

18107231039 is a deficient number, since it is larger than the sum of its proper divisors (306902281).

18107231039 is an equidigital number, since it uses as much as digits as its factorization.

18107231039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306902280.

The product of its (nonzero) digits is 9072, while the sum is 35.

The spelling of 18107231039 in words is "eighteen billion, one hundred seven million, two hundred thirty-one thousand, thirty-nine".