18877313953 has 2 divisors, whose sum is σ = 18877313954. Its totient is φ = 18877313952.

The previous prime is 18877313951. The next prime is 18877313977. The reversal of 18877313953 is 35931377881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10421959744 + 8455354209 = 102088^2 + 91953^2 .

It is a cyclic number.

It is not a de Polignac number, because 18877313953 - 2¹ = 18877313951 is a prime.

Together with 18877313951, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 18877313894 and 18877313903.

It is not a weakly prime, because it can be changed into another prime (18877313951) 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, 9438656976 + 9438656977.

It is an arithmetic number, because the mean of its divisors is an integer number (9438656977).

Almost surely, 2^18877313953 is an apocalyptic number.

It is an amenable number.

18877313953 is a deficient number, since it is larger than the sum of its proper divisors (1).

18877313953 is an equidigital number, since it uses as much as digits as its factorization.

18877313953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3810240, while the sum is 55.

The spelling of 18877313953 in words is "eighteen billion, eight hundred seventy-seven million, three hundred thirteen thousand, nine hundred fifty-three".