18880840241 has 2 divisors, whose sum is σ = 18880840242. Its totient is φ = 18880840240.

The previous prime is 18880840229. The next prime is 18880840283. The reversal of 18880840241 is 14204808881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12706023841 + 6174816400 = 112721^2 + 78580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18880840241 is a prime.

It is a super-2 number, since 2×18880840241² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18880840192 and 18880840201.

It is not a weakly prime, because it can be changed into another prime (18880840211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9440420120 + 9440420121.

It is an arithmetic number, because the mean of its divisors is an integer number (9440420121).

Almost surely, 2^18880840241 is an apocalyptic number.

It is an amenable number.

18880840241 is a deficient number, since it is larger than the sum of its proper divisors (1).

18880840241 is an equidigital number, since it uses as much as digits as its factorization.

18880840241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 131072, while the sum is 44.

The spelling of 18880840241 in words is "eighteen billion, eight hundred eighty million, eight hundred forty thousand, two hundred forty-one".