19729854807 has 24 divisors (see below), whose sum is σ = 28494953424. Its totient is φ = 12137508864.

The previous prime is 19729854787. The next prime is 19729854841. The reversal of 19729854807 is 70845892791.

It is not a de Polignac number, because 19729854807 - 2¹¹ = 19729852759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19729854007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2700183 + ... + 2707479.

It is an arithmetic number, because the mean of its divisors is an integer number (1187289726).

Almost surely, 2^19729854807 is an apocalyptic number.

19729854807 is a deficient number, since it is larger than the sum of its proper divisors (8765098617).

19729854807 is a wasteful number, since it uses less digits than its factorization.

19729854807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12659 (or 12646 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 60.

The spelling of 19729854807 in words is "nineteen billion, seven hundred twenty-nine million, eight hundred fifty-four thousand, eight hundred seven".