18763887009 has 16 divisors (see below), whose sum is σ = 28607144832. Its totient is φ = 10716763008.

The previous prime is 18763887007. The next prime is 18763887011. The reversal of 18763887009 is 90078836781.

It is an interprime number because it is at equal distance from previous prime (18763887007) and next prime (18763887011).

It is not a de Polignac number, because 18763887009 - 2¹ = 18763887007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18763887009.

It is not an unprimeable number, because it can be changed into a prime (18763887001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185004 + ... + 267869.

It is an arithmetic number, because the mean of its divisors is an integer number (1787946552).

Almost surely, 2^18763887009 is an apocalyptic number.

It is an amenable number.

18763887009 is a deficient number, since it is larger than the sum of its proper divisors (9843257823).

18763887009 is a wasteful number, since it uses less digits than its factorization.

18763887009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454856.

The product of its (nonzero) digits is 4064256, while the sum is 57.

The spelling of 18763887009 in words is "eighteen billion, seven hundred sixty-three million, eight hundred eighty-seven thousand, nine".