19701323398 has 4 divisors (see below), whose sum is σ = 29551985100. Its totient is φ = 9850661698.

The previous prime is 19701323393. The next prime is 19701323441. The reversal of 19701323398 is 89332310791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89332310791 = 1123 ⋅79547917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19701323393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4925330848 + ... + 4925330851.

It is an arithmetic number, because the mean of its divisors is an integer number (7387996275).

Almost surely, 2^19701323398 is an apocalyptic number.

19701323398 is a deficient number, since it is larger than the sum of its proper divisors (9850661702).

19701323398 is an equidigital number, since it uses as much as digits as its factorization.

19701323398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9850661701.

The product of its (nonzero) digits is 244944, while the sum is 46.

The spelling of 19701323398 in words is "nineteen billion, seven hundred one million, three hundred twenty-three thousand, three hundred ninety-eight".