18601943039 has 4 divisors (see below), whose sum is σ = 18602319624. Its totient is φ = 18601566456.

The previous prime is 18601943023. The next prime is 18601943051. The reversal of 18601943039 is 93034910681.

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 18601943039 - 2⁴ = 18601943023 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 (18601948039) 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, 100577 + ... + 217530.

It is an arithmetic number, because the mean of its divisors is an integer number (4650579906).

Almost surely, 2^18601943039 is an apocalyptic number.

18601943039 is a deficient number, since it is larger than the sum of its proper divisors (376585).

18601943039 is an equidigital number, since it uses as much as digits as its factorization.

18601943039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376584.

The product of its (nonzero) digits is 139968, while the sum is 44.

The spelling of 18601943039 in words is "eighteen billion, six hundred one million, nine hundred forty-three thousand, thirty-nine".