19198897680 has 80 divisors (see below), whose sum is σ = 61436496384. Its totient is φ = 4954552320.

The previous prime is 19198897673. The next prime is 19198897703. The reversal of 19198897680 is 8679889191.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1282809 + ... + 1297688.

Almost surely, 2^19198897680 is an apocalyptic number.

19198897680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19198897680 is an abundant number, since it is smaller than the sum of its proper divisors (42237598704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19198897680 is a wasteful number, since it uses less digits than its factorization.

19198897680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2580544 (or 2580538 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 66.

The spelling of 19198897680 in words is "nineteen billion, one hundred ninety-eight million, eight hundred ninety-seven thousand, six hundred eighty".