18358987019 has 2 divisors, whose sum is σ = 18358987020. Its totient is φ = 18358987018.

The previous prime is 18358987013. The next prime is 18358987027. The reversal of 18358987019 is 91078985381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18358987019 - 2²⁴ = 18342209803 is a prime.

It is a super-2 number, since 2×18358987019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18358987013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9179493509 + 9179493510.

It is an arithmetic number, because the mean of its divisors is an integer number (9179493510).

Almost surely, 2^18358987019 is an apocalyptic number.

18358987019 is a deficient number, since it is larger than the sum of its proper divisors (1).

18358987019 is an equidigital number, since it uses as much as digits as its factorization.

18358987019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4354560, while the sum is 59.

The spelling of 18358987019 in words is "eighteen billion, three hundred fifty-eight million, nine hundred eighty-seven thousand, nineteen".