18877313951 has 2 divisors, whose sum is σ = 18877313952. Its totient is φ = 18877313950.

The previous prime is 18877313947. The next prime is 18877313953. The reversal of 18877313951 is 15931377881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18877313951 - 2² = 18877313947 is a prime.

Together with 18877313953, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18877313893 and 18877313902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18877313953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9438656975 + 9438656976.

It is an arithmetic number, because the mean of its divisors is an integer number (9438656976).

Almost surely, 2^18877313951 is an apocalyptic number.

18877313951 is a deficient number, since it is larger than the sum of its proper divisors (1).

18877313951 is an equidigital number, since it uses as much as digits as its factorization.

18877313951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 53.

The spelling of 18877313951 in words is "eighteen billion, eight hundred seventy-seven million, three hundred thirteen thousand, nine hundred fifty-one".