18780660863 has 4 divisors (see below), whose sum is σ = 19180249440. Its totient is φ = 18381072288.

The previous prime is 18780660841. The next prime is 18780660881. The reversal of 18780660863 is 36806608781.

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 18780660863 - 2³⁰ = 17706919039 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 (18780660803) 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, 199794218 + ... + 199794311.

It is an arithmetic number, because the mean of its divisors is an integer number (4795062360).

Almost surely, 2^18780660863 is an apocalyptic number.

18780660863 is a deficient number, since it is larger than the sum of its proper divisors (399588577).

18780660863 is an equidigital number, since it uses as much as digits as its factorization.

18780660863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399588576.

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 18780660863 in words is "eighteen billion, seven hundred eighty million, six hundred sixty thousand, eight hundred sixty-three".