18051952145693 has 2 divisors, whose sum is σ = 18051952145694. Its totient is φ = 18051952145692.

The previous prime is 18051952145681. The next prime is 18051952145719. The reversal of 18051952145693 is 39654125915081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17845783478329 + 206168667364 = 4224427^2 + 454058^2 .

It is an emirp because it is prime and its reverse (39654125915081) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18051952145693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18051952145653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9025976072846 + 9025976072847.

It is an arithmetic number, because the mean of its divisors is an integer number (9025976072847).

Almost surely, 2^{18051952145693} is an apocalyptic number.

It is an amenable number.

18051952145693 is a deficient number, since it is larger than the sum of its proper divisors (1).

18051952145693 is an equidigital number, since it uses as much as digits as its factorization.

18051952145693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664000, while the sum is 59.

The spelling of 18051952145693 in words is "eighteen trillion, fifty-one billion, nine hundred fifty-two million, one hundred forty-five thousand, six hundred ninety-three".