18677739723757 has 2 divisors, whose sum is σ = 18677739723758. Its totient is φ = 18677739723756.

The previous prime is 18677739723697. The next prime is 18677739723767. The reversal of 18677739723757 is 75732793777681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11155506480196 + 7522233243561 = 3339986^2 + 2742669^2 .

It is a cyclic number.

It is not a de Polignac number, because 18677739723757 - 2¹⁵ = 18677739690989 is a prime.

It is a super-2 number, since 2×18677739723757² (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 (18677739723767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9338869861878 + 9338869861879.

It is an arithmetic number, because the mean of its divisors is an integer number (9338869861879).

Almost surely, 2^{18677739723757} is an apocalyptic number.

It is an amenable number.

18677739723757 is a deficient number, since it is larger than the sum of its proper divisors (1).

18677739723757 is an equidigital number, since it uses as much as digits as its factorization.

18677739723757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4574193120, while the sum is 79.

The spelling of 18677739723757 in words is "eighteen trillion, six hundred seventy-seven billion, seven hundred thirty-nine million, seven hundred twenty-three thousand, seven hundred fifty-seven".