19992971704 has 8 divisors (see below), whose sum is σ = 37486821960. Its totient is φ = 9996485848.

The previous prime is 19992971681. The next prime is 19992971707. The reversal of 19992971704 is 40717929991.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19992971707) by changing a digit.

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 as a sum of consecutive naturals, namely, 1249560724 + ... + 1249560739.

It is an arithmetic number, because the mean of its divisors is an integer number (4685852745).

Almost surely, 2^19992971704 is an apocalyptic number.

It is an amenable number.

19992971704 is a deficient number, since it is larger than the sum of its proper divisors (17493850256).

19992971704 is a wasteful number, since it uses less digits than its factorization.

19992971704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2499121469 (or 2499121465 counting only the distinct ones).

The product of its (nonzero) digits is 2571912, while the sum is 58.

The spelling of 19992971704 in words is "nineteen billion, nine hundred ninety-two million, nine hundred seventy-one thousand, seven hundred four".