18867214687 has 2 divisors, whose sum is σ = 18867214688. Its totient is φ = 18867214686.

The previous prime is 18867214657. The next prime is 18867214697. The reversal of 18867214687 is 78641276881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18867214687 - 2¹⁵ = 18867181919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18867214657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9433607343 + 9433607344.

It is an arithmetic number, because the mean of its divisors is an integer number (9433607344).

Almost surely, 2^18867214687 is an apocalyptic number.

18867214687 is a deficient number, since it is larger than the sum of its proper divisors (1).

18867214687 is an equidigital number, since it uses as much as digits as its factorization.

18867214687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7225344, while the sum is 58.

The spelling of 18867214687 in words is "eighteen billion, eight hundred sixty-seven million, two hundred fourteen thousand, six hundred eighty-seven".