18649726133 has 2 divisors, whose sum is σ = 18649726134. Its totient is φ = 18649726132.

The previous prime is 18649726079. The next prime is 18649726181. The reversal of 18649726133 is 33162794681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11590029649 + 7059696484 = 107657^2 + 84022^2 .

It is an emirp because it is prime and its reverse (33162794681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18649726133 - 2¹² = 18649722037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18649726033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9324863066 + 9324863067.

It is an arithmetic number, because the mean of its divisors is an integer number (9324863067).

Almost surely, 2^18649726133 is an apocalyptic number.

It is an amenable number.

18649726133 is a deficient number, since it is larger than the sum of its proper divisors (1).

18649726133 is an equidigital number, since it uses as much as digits as its factorization.

18649726133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 50.

The spelling of 18649726133 in words is "eighteen billion, six hundred forty-nine million, seven hundred twenty-six thousand, one hundred thirty-three".