19287889013 has 2 divisors, whose sum is σ = 19287889014. Its totient is φ = 19287889012.

The previous prime is 19287888959. The next prime is 19287889021. The reversal of 19287889013 is 31098878291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16735820689 + 2552068324 = 129367^2 + 50518^2 .

It is a cyclic number.

It is not a de Polignac number, because 19287889013 - 2¹⁰ = 19287887989 is a prime.

It is a super-2 number, since 2×19287889013² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19287889013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19287889913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9643944506 + 9643944507.

It is an arithmetic number, because the mean of its divisors is an integer number (9643944507).

Almost surely, 2^19287889013 is an apocalyptic number.

It is an amenable number.

19287889013 is a deficient number, since it is larger than the sum of its proper divisors (1).

19287889013 is an equidigital number, since it uses as much as digits as its factorization.

19287889013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 56.

The spelling of 19287889013 in words is "nineteen billion, two hundred eighty-seven million, eight hundred eighty-nine thousand, thirteen".