18694141652629 has 2 divisors, whose sum is σ = 18694141652630. Its totient is φ = 18694141652628.

The previous prime is 18694141652539. The next prime is 18694141652657. The reversal of 18694141652629 is 92625614149681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17708122442404 + 986019210225 = 4208102^2 + 992985^2 .

It is an emirp because it is prime and its reverse (92625614149681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18694141652629 - 2²³ = 18694133264021 is a prime.

It is a super-2 number, since 2×18694141652629² (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 (18694141652129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9347070826314 + 9347070826315.

It is an arithmetic number, because the mean of its divisors is an integer number (9347070826315).

Almost surely, 2^{18694141652629} is an apocalyptic number.

It is an amenable number.

18694141652629 is a deficient number, since it is larger than the sum of its proper divisors (1).

18694141652629 is an equidigital number, since it uses as much as digits as its factorization.

18694141652629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44789760, while the sum is 64.

The spelling of 18694141652629 in words is "eighteen trillion, six hundred ninety-four billion, one hundred forty-one million, six hundred fifty-two thousand, six hundred twenty-nine".