19798217776 has 20 divisors (see below), whose sum is σ = 38540849944. Its totient is φ = 9852192000.

The previous prime is 19798217773. The next prime is 19798217783. The reversal of 19798217776 is 67771289791.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (19798217773) 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, 2928825 + ... + 2935576.

Almost surely, 2^19798217776 is an apocalyptic number.

19798217776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19798217776 is a deficient number, since it is larger than the sum of its proper divisors (18742632168).

19798217776 is a wasteful number, since it uses less digits than its factorization.

19798217776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5864620 (or 5864614 counting only the distinct ones).

The product of its digits is 18670176, while the sum is 64.

The spelling of 19798217776 in words is "nineteen billion, seven hundred ninety-eight million, two hundred seventeen thousand, seven hundred seventy-six".