19802750399 has 8 divisors (see below), whose sum is σ = 20846400000. Its totient is φ = 18759240792.

The previous prime is 19802750321. The next prime is 19802750417. The reversal of 19802750399 is 99305720891.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19802750399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19802750399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19802750699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 384242 + ... + 432720.

It is an arithmetic number, because the mean of its divisors is an integer number (2605800000).

Almost surely, 2^19802750399 is an apocalyptic number.

19802750399 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

19802750399 is a deficient number, since it is larger than the sum of its proper divisors (1043649601).

19802750399 is a wasteful number, since it uses less digits than its factorization.

19802750399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69997.

The product of its (nonzero) digits is 1224720, while the sum is 53.

The spelling of 19802750399 in words is "nineteen billion, eight hundred two million, seven hundred fifty thousand, three hundred ninety-nine".