18863370839 has 2 divisors, whose sum is σ = 18863370840. Its totient is φ = 18863370838.

The previous prime is 18863370797. The next prime is 18863370847. The reversal of 18863370839 is 93807336881.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18863370839 - 2⁸ = 18863370583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18863370739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9431685419 + 9431685420.

It is an arithmetic number, because the mean of its divisors is an integer number (9431685420).

Almost surely, 2^18863370839 is an apocalyptic number.

18863370839 is a deficient number, since it is larger than the sum of its proper divisors (1).

18863370839 is an equidigital number, since it uses as much as digits as its factorization.

18863370839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 18863370839 in words is "eighteen billion, eight hundred sixty-three million, three hundred seventy thousand, eight hundred thirty-nine".