18382928281 has 2 divisors, whose sum is σ = 18382928282. Its totient is φ = 18382928280.

The previous prime is 18382928209. The next prime is 18382928287. The reversal of 18382928281 is 18282928381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11968360000 + 6414568281 = 109400^2 + 80091^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18382928281 is a prime.

It is a super-2 number, since 2×18382928281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18382928287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9191464140 + 9191464141.

It is an arithmetic number, because the mean of its divisors is an integer number (9191464141).

Almost surely, 2^18382928281 is an apocalyptic number.

It is an amenable number.

18382928281 is a deficient number, since it is larger than the sum of its proper divisors (1).

18382928281 is an equidigital number, since it uses as much as digits as its factorization.

18382928281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 884736, while the sum is 52.

The spelling of 18382928281 in words is "eighteen billion, three hundred eighty-two million, nine hundred twenty-eight thousand, two hundred eighty-one".