19989089084 has 12 divisors (see below), whose sum is σ = 35127271200. Its totient is φ = 9952725888.

The previous prime is 19989089077. The next prime is 19989089089. The reversal of 19989089084 is 48098098991.

It is a self number, because there is not a number n which added to its sum of digits gives 19989089084.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10453589 + ... + 10455500.

It is an arithmetic number, because the mean of its divisors is an integer number (2927272600).

Almost surely, 2^19989089084 is an apocalyptic number.

It is an amenable number.

19989089084 is a deficient number, since it is larger than the sum of its proper divisors (15138182116).

19989089084 is a wasteful number, since it uses less digits than its factorization.

19989089084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20909332 (or 20909330 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 65.

The spelling of 19989089084 in words is "nineteen billion, nine hundred eighty-nine million, eighty-nine thousand, eighty-four".