18336867235487 has 2 divisors, whose sum is σ = 18336867235488. Its totient is φ = 18336867235486.

The previous prime is 18336867235483. The next prime is 18336867235501. The reversal of 18336867235487 is 78453276863381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18336867235487 - 2² = 18336867235483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18336867235487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18336867235483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9168433617743 + 9168433617744.

It is an arithmetic number, because the mean of its divisors is an integer number (9168433617744).

Almost surely, 2^{18336867235487} is an apocalyptic number.

18336867235487 is a deficient number, since it is larger than the sum of its proper divisors (1).

18336867235487 is an equidigital number, since it uses as much as digits as its factorization.

18336867235487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 975421440, while the sum is 71.

The spelling of 18336867235487 in words is "eighteen trillion, three hundred thirty-six billion, eight hundred sixty-seven million, two hundred thirty-five thousand, four hundred eighty-seven".