19980836589 has 16 divisors (see below), whose sum is σ = 30476496512. Its totient is φ = 11406555648.

The previous prime is 19980836581. The next prime is 19980836591. The reversal of 19980836589 is 98563808991.

It is not a de Polignac number, because 19980836589 - 2³ = 19980836581 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19980836581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 438844 + ... + 482229.

It is an arithmetic number, because the mean of its divisors is an integer number (1904781032).

Almost surely, 2^19980836589 is an apocalyptic number.

It is an amenable number.

19980836589 is a deficient number, since it is larger than the sum of its proper divisors (10495659923).

19980836589 is a wasteful number, since it uses less digits than its factorization.

19980836589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922116.

The product of its (nonzero) digits is 33592320, while the sum is 66.

The spelling of 19980836589 in words is "nineteen billion, nine hundred eighty million, eight hundred thirty-six thousand, five hundred eighty-nine".