19806080397 has 8 divisors (see below), whose sum is σ = 26409855456. Its totient is φ = 13203179472.

The previous prime is 19806080351. The next prime is 19806080417. The reversal of 19806080397 is 79308060891.

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

It is not a de Polignac number, because 19806080397 - 2¹⁶ = 19806014861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19806080347) 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, 163698 + ... + 257699.

It is an arithmetic number, because the mean of its divisors is an integer number (3301231932).

Almost surely, 2^19806080397 is an apocalyptic number.

It is an amenable number.

19806080397 is a deficient number, since it is larger than the sum of its proper divisors (6603775059).

19806080397 is a wasteful number, since it uses less digits than its factorization.

19806080397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437067.

The product of its (nonzero) digits is 653184, while the sum is 51.

The spelling of 19806080397 in words is "nineteen billion, eight hundred six million, eighty thousand, three hundred ninety-seven".