18879462857 has 2 divisors, whose sum is σ = 18879462858. Its totient is φ = 18879462856.

The previous prime is 18879462827. The next prime is 18879462871. The reversal of 18879462857 is 75826497881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17026074256 + 1853388601 = 130484^2 + 43051^2 .

It is a cyclic number.

It is not a de Polignac number, because 18879462857 - 2¹² = 18879458761 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18879462793 and 18879462802.

It is not a weakly prime, because it can be changed into another prime (18879462827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9439731428 + 9439731429.

It is an arithmetic number, because the mean of its divisors is an integer number (9439731429).

Almost surely, 2^18879462857 is an apocalyptic number.

It is an amenable number.

18879462857 is a deficient number, since it is larger than the sum of its proper divisors (1).

18879462857 is an equidigital number, since it uses as much as digits as its factorization.

18879462857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54190080, while the sum is 65.

The spelling of 18879462857 in words is "eighteen billion, eight hundred seventy-nine million, four hundred sixty-two thousand, eight hundred fifty-seven".