19782323297 has 4 divisors (see below), whose sum is σ = 21580716336. Its totient is φ = 17983930260.

The previous prime is 19782323279. The next prime is 19782323303. The reversal of 19782323297 is 79232328791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19782323297 - 2¹² = 19782319201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19782323597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 899196503 + ... + 899196524.

It is an arithmetic number, because the mean of its divisors is an integer number (5395179084).

Almost surely, 2^19782323297 is an apocalyptic number.

It is an amenable number.

19782323297 is a deficient number, since it is larger than the sum of its proper divisors (1798393039).

19782323297 is a wasteful number, since it uses less digits than its factorization.

19782323297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798393038.

The product of its digits is 2286144, while the sum is 53.

The spelling of 19782323297 in words is "nineteen billion, seven hundred eighty-two million, three hundred twenty-three thousand, two hundred ninety-seven".