19380321797 has 8 divisors (see below), whose sum is σ = 20279665656. Its totient is φ = 18500743872.

The previous prime is 19380321787. The next prime is 19380321823. The reversal of 19380321797 is 79712308391.

It can be written as a sum of positive squares in 4 ways, for example, as 3817509796 + 15562812001 = 61786^2 + 124751^2 .

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 19380321797 - 2²² = 19376127493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19380321787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4939478 + ... + 4943399.

It is an arithmetic number, because the mean of its divisors is an integer number (2534958207).

Almost surely, 2^19380321797 is an apocalyptic number.

It is an amenable number.

19380321797 is a deficient number, since it is larger than the sum of its proper divisors (899343859).

19380321797 is an equidigital number, since it uses as much as digits as its factorization.

19380321797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9882967.

The product of its (nonzero) digits is 571536, while the sum is 50.

The spelling of 19380321797 in words is "nineteen billion, three hundred eighty million, three hundred twenty-one thousand, seven hundred ninety-seven".