18911167414273 has 2 divisors, whose sum is σ = 18911167414274. Its totient is φ = 18911167414272.

The previous prime is 18911167414199. The next prime is 18911167414343. The reversal of 18911167414273 is 37241476111981.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10748221288704 + 8162946125569 = 3278448^2 + 2857087^2 .

It is a cyclic number.

It is not a de Polignac number, because 18911167414273 - 2²⁹ = 18910630543361 is a prime.

It is not a weakly prime, because it can be changed into another prime (18911167414973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9455583707136 + 9455583707137.

It is an arithmetic number, because the mean of its divisors is an integer number (9455583707137).

Almost surely, 2^{18911167414273} is an apocalyptic number.

It is an amenable number.

18911167414273 is a deficient number, since it is larger than the sum of its proper divisors (1).

18911167414273 is an equidigital number, since it uses as much as digits as its factorization.

18911167414273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 55.

The spelling of 18911167414273 in words is "eighteen trillion, nine hundred eleven billion, one hundred sixty-seven million, four hundred fourteen thousand, two hundred seventy-three".