19890298589 has 24 divisors (see below), whose sum is σ = 23435707320. Its totient is φ = 16829869056.

The previous prime is 19890298583. The next prime is 19890298591. The reversal of 19890298589 is 98589209891.

It can be written as a sum of positive squares in 4 ways, for example, as 6091802500 + 13798496089 = 78050^2 + 117467^2 .

It is not a de Polignac number, because 19890298589 - 2⁴ = 19890298573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19890298583) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2949029 + ... + 2955765.

It is an arithmetic number, because the mean of its divisors is an integer number (976487805).

Almost surely, 2^19890298589 is an apocalyptic number.

It is an amenable number.

19890298589 is a deficient number, since it is larger than the sum of its proper divisors (3545408731).

19890298589 is an equidigital number, since it uses as much as digits as its factorization.

19890298589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7517 (or 7510 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 68.

The spelling of 19890298589 in words is "nineteen billion, eight hundred ninety million, two hundred ninety-eight thousand, five hundred eighty-nine".