18840487288297 has 2 divisors, whose sum is σ = 18840487288298. Its totient is φ = 18840487288296.

The previous prime is 18840487288277. The next prime is 18840487288307. The reversal of 18840487288297 is 79288278404881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15364291112361 + 3476196175936 = 3919731^2 + 1864456^2 .

It is a cyclic number.

It is not a de Polignac number, because 18840487288297 - 2¹⁵ = 18840487255529 is a prime.

It is a super-2 number, since 2×18840487288297² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18840487288277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9420243644148 + 9420243644149.

It is an arithmetic number, because the mean of its divisors is an integer number (9420243644149).

Almost surely, 2^{18840487288297} is an apocalyptic number.

It is an amenable number.

18840487288297 is a deficient number, since it is larger than the sum of its proper divisors (1).

18840487288297 is an equidigital number, since it uses as much as digits as its factorization.

18840487288297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 924844032, while the sum is 76.

The spelling of 18840487288297 in words is "eighteen trillion, eight hundred forty billion, four hundred eighty-seven million, two hundred eighty-eight thousand, two hundred ninety-seven".