19989089086 has 16 divisors (see below), whose sum is σ = 31454425440. Its totient is φ = 9513988960.

The previous prime is 19989089077. The next prime is 19989089089. The reversal of 19989089086 is 68098098991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19989089089) 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 7 ways as a sum of consecutive naturals, for example, 2422921 + ... + 2431156.

It is an arithmetic number, because the mean of its divisors is an integer number (1965901590).

Almost surely, 2^19989089086 is an apocalyptic number.

19989089086 is a deficient number, since it is larger than the sum of its proper divisors (11465336354).

19989089086 is a wasteful number, since it uses less digits than its factorization.

19989089086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4854179.

The product of its (nonzero) digits is 20155392, while the sum is 67.

The spelling of 19989089086 in words is "nineteen billion, nine hundred eighty-nine million, eighty-nine thousand, eighty-six".