18889113601 has 2 divisors, whose sum is σ = 18889113602. Its totient is φ = 18889113600.

The previous prime is 18889113521. The next prime is 18889113611. The reversal of 18889113601 is 10631198881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18513684225 + 375429376 = 136065^2 + 19376^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18889113601 is a prime.

It is a super-2 number, since 2×18889113601² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18889113611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9444556800 + 9444556801.

It is an arithmetic number, because the mean of its divisors is an integer number (9444556801).

Almost surely, 2^18889113601 is an apocalyptic number.

It is an amenable number.

18889113601 is a deficient number, since it is larger than the sum of its proper divisors (1).

18889113601 is an equidigital number, since it uses as much as digits as its factorization.

18889113601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 46.

The spelling of 18889113601 in words is "eighteen billion, eight hundred eighty-nine million, one hundred thirteen thousand, six hundred one".