19998805548 has 48 divisors (see below), whose sum is σ = 46911644640. Its totient is φ = 6630948864.

The previous prime is 19998805517. The next prime is 19998805573. The reversal of 19998805548 is 84550889991.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2379738 + ... + 2388126.

It is an arithmetic number, because the mean of its divisors is an integer number (977325930).

Almost surely, 2^19998805548 is an apocalyptic number.

It is an amenable number.

19998805548 is an abundant number, since it is smaller than the sum of its proper divisors (26912839092).

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

19998805548 is a wasteful number, since it uses less digits than its factorization.

19998805548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9426 (or 9424 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 66.

The spelling of 19998805548 in words is "nineteen billion, nine hundred ninety-eight million, eight hundred five thousand, five hundred forty-eight".