19859954799 has 8 divisors (see below), whose sum is σ = 26507046960. Its totient is φ = 13226416256.

The previous prime is 19859954797. The next prime is 19859954867. The reversal of 19859954799 is 99745995891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19859954799 - 2¹ = 19859954797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19859954799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19859954791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3384984 + ... + 3390845.

It is an arithmetic number, because the mean of its divisors is an integer number (3313380870).

Almost surely, 2^19859954799 is an apocalyptic number.

19859954799 is a deficient number, since it is larger than the sum of its proper divisors (6647092161).

19859954799 is an equidigital number, since it uses as much as digits as its factorization.

19859954799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6776809.

The product of its digits is 330674400, while the sum is 75.

It can be divided in two parts, 19859954 and 799, that added together give a triangular number (19860753 = T₆₃₀₂).

The spelling of 19859954799 in words is "nineteen billion, eight hundred fifty-nine million, nine hundred fifty-four thousand, seven hundred ninety-nine".