18872863589 has 2 divisors, whose sum is σ = 18872863590. Its totient is φ = 18872863588.

The previous prime is 18872863579. The next prime is 18872863613. The reversal of 18872863589 is 98536827881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18102357025 + 770506564 = 134545^2 + 27758^2 .

It is a cyclic number.

It is not a de Polignac number, because 18872863589 - 2¹² = 18872859493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18872863549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9436431794 + 9436431795.

It is an arithmetic number, because the mean of its divisors is an integer number (9436431795).

Almost surely, 2^18872863589 is an apocalyptic number.

It is an amenable number.

18872863589 is a deficient number, since it is larger than the sum of its proper divisors (1).

18872863589 is an equidigital number, since it uses as much as digits as its factorization.

18872863589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46448640, while the sum is 65.

The spelling of 18872863589 in words is "eighteen billion, eight hundred seventy-two million, eight hundred sixty-three thousand, five hundred eighty-nine".