18700943039 has 4 divisors (see below), whose sum is σ = 18701233824. Its totient is φ = 18700652256.

The previous prime is 18700943033. The next prime is 18700943071. The reversal of 18700943039 is 93034900781.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18700943039 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 (18700943033) 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, 1367 + ... + 193400.

It is an arithmetic number, because the mean of its divisors is an integer number (4675308456).

Almost surely, 2^18700943039 is an apocalyptic number.

18700943039 is a deficient number, since it is larger than the sum of its proper divisors (290785).

18700943039 is an equidigital number, since it uses as much as digits as its factorization.

18700943039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290784.

The product of its (nonzero) digits is 163296, while the sum is 44.

The spelling of 18700943039 in words is "eighteen billion, seven hundred million, nine hundred forty-three thousand, thirty-nine".