18743718863 has 4 divisors (see below), whose sum is σ = 19142521440. Its totient is φ = 18344916288.

The previous prime is 18743718853. The next prime is 18743718949. The reversal of 18743718863 is 36881734781.

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 18743718863 - 2⁸ = 18743718607 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18743718799 and 18743718808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18743718853) 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, 199401218 + ... + 199401311.

It is an arithmetic number, because the mean of its divisors is an integer number (4785630360).

Almost surely, 2^18743718863 is an apocalyptic number.

18743718863 is a deficient number, since it is larger than the sum of its proper divisors (398802577).

18743718863 is an equidigital number, since it uses as much as digits as its factorization.

18743718863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398802576.

The product of its digits is 5419008, while the sum is 56.

The spelling of 18743718863 in words is "eighteen billion, seven hundred forty-three million, seven hundred eighteen thousand, eight hundred sixty-three".