18583436881 has 2 divisors, whose sum is σ = 18583436882. Its totient is φ = 18583436880.

The previous prime is 18583436873. The next prime is 18583436929. The reversal of 18583436881 is 18863438581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18403635600 + 179801281 = 135660^2 + 13409^2 .

It is a cyclic number.

It is not a de Polignac number, because 18583436881 - 2³ = 18583436873 is a prime.

It is a super-2 number, since 2×18583436881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18583436821) 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, 9291718440 + 9291718441.

It is an arithmetic number, because the mean of its divisors is an integer number (9291718441).

Almost surely, 2^18583436881 is an apocalyptic number.

It is an amenable number.

18583436881 is a deficient number, since it is larger than the sum of its proper divisors (1).

18583436881 is an equidigital number, since it uses as much as digits as its factorization.

18583436881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4423680, while the sum is 55.

The spelling of 18583436881 in words is "eighteen billion, five hundred eighty-three million, four hundred thirty-six thousand, eight hundred eighty-one".