19897605304 has 16 divisors (see below), whose sum is σ = 37503342720. Its totient is φ = 9896713920.

The previous prime is 19897605283. The next prime is 19897605313. The reversal of 19897605304 is 40350679891.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6509469 + ... + 6512524.

It is an arithmetic number, because the mean of its divisors is an integer number (2343958920).

Almost surely, 2^19897605304 is an apocalyptic number.

It is an amenable number.

19897605304 is a deficient number, since it is larger than the sum of its proper divisors (17605737416).

19897605304 is a wasteful number, since it uses less digits than its factorization.

19897605304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13022190 (or 13022186 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 19897605304 in words is "nineteen billion, eight hundred ninety-seven million, six hundred five thousand, three hundred four".