19980418089 has 16 divisors (see below), whose sum is σ = 26784000000. Its totient is φ = 13248606096.

The previous prime is 19980418049. The next prime is 19980418093. The reversal of 19980418089 is 98081408991.

It is not a de Polignac number, because 19980418089 - 2²⁰ = 19979369513 is a prime.

It is a super-2 number, since 2×19980418089² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19980418039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2660662 + ... + 2668160.

It is an arithmetic number, because the mean of its divisors is an integer number (1674000000).

Almost surely, 2^19980418089 is an apocalyptic number.

It is an amenable number.

19980418089 is a deficient number, since it is larger than the sum of its proper divisors (6803581911).

19980418089 is a wasteful number, since it uses less digits than its factorization.

19980418089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12164.

The product of its (nonzero) digits is 1492992, while the sum is 57.

The spelling of 19980418089 in words is "nineteen billion, nine hundred eighty million, four hundred eighteen thousand, eighty-nine".