18878712833 has 2 divisors, whose sum is σ = 18878712834. Its totient is φ = 18878712832.

The previous prime is 18878712829. The next prime is 18878712863. The reversal of 18878712833 is 33821787881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17426112064 + 1452600769 = 132008^2 + 38113^2 .

It is a cyclic number.

It is not a de Polignac number, because 18878712833 - 2² = 18878712829 is a prime.

It is not a weakly prime, because it can be changed into another prime (18878712863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9439356416 + 9439356417.

It is an arithmetic number, because the mean of its divisors is an integer number (9439356417).

Almost surely, 2^18878712833 is an apocalyptic number.

It is an amenable number.

18878712833 is a deficient number, since it is larger than the sum of its proper divisors (1).

18878712833 is an equidigital number, since it uses as much as digits as its factorization.

18878712833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3612672, while the sum is 56.

The spelling of 18878712833 in words is "eighteen billion, eight hundred seventy-eight million, seven hundred twelve thousand, eight hundred thirty-three".