18498553687 has 2 divisors, whose sum is σ = 18498553688. Its totient is φ = 18498553686.

The previous prime is 18498553673. The next prime is 18498553693. The reversal of 18498553687 is 78635589481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18498553687 - 2¹⁵ = 18498520919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18498553627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9249276843 + 9249276844.

It is an arithmetic number, because the mean of its divisors is an integer number (9249276844).

Almost surely, 2^18498553687 is an apocalyptic number.

18498553687 is a deficient number, since it is larger than the sum of its proper divisors (1).

18498553687 is an equidigital number, since it uses as much as digits as its factorization.

18498553687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58060800, while the sum is 64.

The spelling of 18498553687 in words is "eighteen billion, four hundred ninety-eight million, five hundred fifty-three thousand, six hundred eighty-seven".