18849228117229 has 2 divisors, whose sum is σ = 18849228117230. Its totient is φ = 18849228117228.

The previous prime is 18849228117169. The next prime is 18849228117259. The reversal of 18849228117229 is 92271182294881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18640719900100 + 208508217129 = 4317490^2 + 456627^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18849228117229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18849228117259) 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, 9424614058614 + 9424614058615.

It is an arithmetic number, because the mean of its divisors is an integer number (9424614058615).

Almost surely, 2^{18849228117229} is an apocalyptic number.

It is an amenable number.

18849228117229 is a deficient number, since it is larger than the sum of its proper divisors (1).

18849228117229 is an equidigital number, since it uses as much as digits as its factorization.

18849228117229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18579456, while the sum is 64.

The spelling of 18849228117229 in words is "eighteen trillion, eight hundred forty-nine billion, two hundred twenty-eight million, one hundred seventeen thousand, two hundred twenty-nine".