19897769384 has 32 divisors (see below), whose sum is σ = 39155512320. Its totient is φ = 9461301696.

The previous prime is 19897769369. The next prime is 19897769429. The reversal of 19897769384 is 48396779891.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280712 + ... + 344375.

It is an arithmetic number, because the mean of its divisors is an integer number (1223609760).

Almost surely, 2^19897769384 is an apocalyptic number.

It is an amenable number.

19897769384 is a deficient number, since it is larger than the sum of its proper divisors (19257742936).

19897769384 is a wasteful number, since it uses less digits than its factorization.

19897769384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625289 (or 625285 counting only the distinct ones).

The product of its digits is 164602368, while the sum is 71.

The spelling of 19897769384 in words is "nineteen billion, eight hundred ninety-seven million, seven hundred sixty-nine thousand, three hundred eighty-four".