18013751669 has 2 divisors, whose sum is σ = 18013751670. Its totient is φ = 18013751668.

The previous prime is 18013751627. The next prime is 18013751681. The reversal of 18013751669 is 96615731081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16877387569 + 1136364100 = 129913^2 + 33710^2 .

It is a cyclic number.

It is not a de Polignac number, because 18013751669 - 2¹⁶ = 18013686133 is a prime.

It is a super-2 number, since 2×18013751669² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18013750669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9006875834 + 9006875835.

It is an arithmetic number, because the mean of its divisors is an integer number (9006875835).

Almost surely, 2^18013751669 is an apocalyptic number.

It is an amenable number.

18013751669 is a deficient number, since it is larger than the sum of its proper divisors (1).

18013751669 is an equidigital number, since it uses as much as digits as its factorization.

18013751669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 47.

The spelling of 18013751669 in words is "eighteen billion, thirteen million, seven hundred fifty-one thousand, six hundred sixty-nine".