18811372843 has 2 divisors, whose sum is σ = 18811372844. Its totient is φ = 18811372842.

The previous prime is 18811372781. The next prime is 18811372859. The reversal of 18811372843 is 34827311881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18811372843 - 2³³ = 10221438251 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18811372793 and 18811372802.

It is not a weakly prime, because it can be changed into another prime (18811372343) 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, 9405686421 + 9405686422.

It is an arithmetic number, because the mean of its divisors is an integer number (9405686422).

Almost surely, 2^18811372843 is an apocalyptic number.

18811372843 is a deficient number, since it is larger than the sum of its proper divisors (1).

18811372843 is an equidigital number, since it uses as much as digits as its factorization.

18811372843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 46.

The spelling of 18811372843 in words is "eighteen billion, eight hundred eleven million, three hundred seventy-two thousand, eight hundred forty-three".