18319874515429 has 2 divisors, whose sum is σ = 18319874515430. Its totient is φ = 18319874515428.

The previous prime is 18319874515363. The next prime is 18319874515529. The reversal of 18319874515429 is 92451547891381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13113596412900 + 5206278102529 = 3621270^2 + 2281727^2 .

It is a cyclic number.

It is not a de Polignac number, because 18319874515429 - 2¹³ = 18319874507237 is a prime.

It is a super-2 number, since 2×18319874515429² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18319874515529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9159937257714 + 9159937257715.

It is an arithmetic number, because the mean of its divisors is an integer number (9159937257715).

Almost surely, 2^{18319874515429} is an apocalyptic number.

It is an amenable number.

18319874515429 is a deficient number, since it is larger than the sum of its proper divisors (1).

18319874515429 is an equidigital number, since it uses as much as digits as its factorization.

18319874515429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87091200, while the sum is 67.

The spelling of 18319874515429 in words is "eighteen trillion, three hundred nineteen billion, eight hundred seventy-four million, five hundred fifteen thousand, four hundred twenty-nine".