18938656567241 has 2 divisors, whose sum is σ = 18938656567242. Its totient is φ = 18938656567240.

The previous prime is 18938656567231. The next prime is 18938656567279. The reversal of 18938656567241 is 14276565683981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12960612007225 + 5978044560016 = 3600085^2 + 2445004^2 .

It is a cyclic number.

It is not a de Polignac number, because 18938656567241 - 2⁶ = 18938656567177 is a prime.

It is a super-5 number, since 5×18938656567241⁵ (a number of 68 digits) contains 55555 as substring.

It is not a weakly prime, because it can be changed into another prime (18938656567211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9469328283620 + 9469328283621.

It is an arithmetic number, because the mean of its divisors is an integer number (9469328283621).

Almost surely, 2^{18938656567241} is an apocalyptic number.

It is an amenable number.

18938656567241 is a deficient number, since it is larger than the sum of its proper divisors (1).

18938656567241 is an equidigital number, since it uses as much as digits as its factorization.

18938656567241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 522547200, while the sum is 71.

The spelling of 18938656567241 in words is "eighteen trillion, nine hundred thirty-eight billion, six hundred fifty-six million, five hundred sixty-seven thousand, two hundred forty-one".