18396686887153 has 2 divisors, whose sum is σ = 18396686887154. Its totient is φ = 18396686887152.

The previous prime is 18396686887123. The next prime is 18396686887211. The reversal of 18396686887153 is 35178868669381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16280805362704 + 2115881524449 = 4034948^2 + 1454607^2 .

It is a cyclic number.

It is not a de Polignac number, because 18396686887153 - 2¹⁷ = 18396686756081 is a prime.

It is not a weakly prime, because it can be changed into another prime (18396686887123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9198343443576 + 9198343443577.

It is an arithmetic number, because the mean of its divisors is an integer number (9198343443577).

Almost surely, 2^{18396686887153} is an apocalyptic number.

It is an amenable number.

18396686887153 is a deficient number, since it is larger than the sum of its proper divisors (1).

18396686887153 is an equidigital number, since it uses as much as digits as its factorization.

18396686887153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2508226560, while the sum is 79.

The spelling of 18396686887153 in words is "eighteen trillion, three hundred ninety-six billion, six hundred eighty-six million, eight hundred eighty-seven thousand, one hundred fifty-three".