18229185019 has 2 divisors, whose sum is σ = 18229185020. Its totient is φ = 18229185018.

The previous prime is 18229184977. The next prime is 18229185031. The reversal of 18229185019 is 91058192281.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18229185019 - 2²¹ = 18227087867 is a prime.

It is a super-2 number, since 2×18229185019² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18229185019.

It is not a weakly prime, because it can be changed into another prime (18229185059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9114592509 + 9114592510.

It is an arithmetic number, because the mean of its divisors is an integer number (9114592510).

Almost surely, 2^18229185019 is an apocalyptic number.

18229185019 is a deficient number, since it is larger than the sum of its proper divisors (1).

18229185019 is an equidigital number, since it uses as much as digits as its factorization.

18229185019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 46.

The spelling of 18229185019 in words is "eighteen billion, two hundred twenty-nine million, one hundred eighty-five thousand, nineteen".