18715052087 has 2 divisors, whose sum is σ = 18715052088. Its totient is φ = 18715052086.

The previous prime is 18715052077. The next prime is 18715052101. The reversal of 18715052087 is 78025051781.

It is a weak prime.

It is an emirp because it is prime and its reverse (78025051781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18715052087 - 2¹² = 18715047991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18715052077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9357526043 + 9357526044.

It is an arithmetic number, because the mean of its divisors is an integer number (9357526044).

Almost surely, 2^18715052087 is an apocalyptic number.

18715052087 is a deficient number, since it is larger than the sum of its proper divisors (1).

18715052087 is an equidigital number, since it uses as much as digits as its factorization.

18715052087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 156800, while the sum is 44.

The spelling of 18715052087 in words is "eighteen billion, seven hundred fifteen million, fifty-two thousand, eighty-seven".