19849255907 has 4 divisors (see below), whose sum is σ = 21376121760. Its totient is φ = 18322390056.

The previous prime is 19849255903. The next prime is 19849255919. The reversal of 19849255907 is 70955294891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19849255907 - 2² = 19849255903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19849255903) 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, 763432907 + ... + 763432932.

It is an arithmetic number, because the mean of its divisors is an integer number (5344030440).

Almost surely, 2^19849255907 is an apocalyptic number.

19849255907 is a deficient number, since it is larger than the sum of its proper divisors (1526865853).

19849255907 is a wasteful number, since it uses less digits than its factorization.

19849255907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526865852.

The product of its (nonzero) digits is 8164800, while the sum is 59.

The spelling of 19849255907 in words is "nineteen billion, eight hundred forty-nine million, two hundred fifty-five thousand, nine hundred seven".