18708185087 has 2 divisors, whose sum is σ = 18708185088. Its totient is φ = 18708185086.

The previous prime is 18708185047. The next prime is 18708185101. The reversal of 18708185087 is 78058180781.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18708185087 - 2³⁰ = 17634443263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18708185047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9354092543 + 9354092544.

It is an arithmetic number, because the mean of its divisors is an integer number (9354092544).

Almost surely, 2^18708185087 is an apocalyptic number.

18708185087 is a deficient number, since it is larger than the sum of its proper divisors (1).

18708185087 is an equidigital number, since it uses as much as digits as its factorization.

18708185087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1003520, while the sum is 53.

The spelling of 18708185087 in words is "eighteen billion, seven hundred eight million, one hundred eighty-five thousand, eighty-seven".