18877377313 has 2 divisors, whose sum is σ = 18877377314. Its totient is φ = 18877377312.

The previous prime is 18877377301. The next prime is 18877377329. The reversal of 18877377313 is 31377377881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17443013184 + 1434364129 = 132072^2 + 37873^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18877377313 is a prime.

It is not a weakly prime, because it can be changed into another prime (18877377373) 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, 9438688656 + 9438688657.

It is an arithmetic number, because the mean of its divisors is an integer number (9438688657).

Almost surely, 2^18877377313 is an apocalyptic number.

It is an amenable number.

18877377313 is a deficient number, since it is larger than the sum of its proper divisors (1).

18877377313 is an equidigital number, since it uses as much as digits as its factorization.

18877377313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4148928, while the sum is 55.

The spelling of 18877377313 in words is "eighteen billion, eight hundred seventy-seven million, three hundred seventy-seven thousand, three hundred thirteen".