19942831297 has 4 divisors (see below), whose sum is σ = 19956847360. Its totient is φ = 19928815236.

The previous prime is 19942831277. The next prime is 19942831313. The reversal of 19942831297 is 79213824991.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-19942831297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19942831277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7005897 + ... + 7008742.

It is an arithmetic number, because the mean of its divisors is an integer number (4989211840).

Almost surely, 2^19942831297 is an apocalyptic number.

It is an amenable number.

19942831297 is a deficient number, since it is larger than the sum of its proper divisors (14016063).

19942831297 is a wasteful number, since it uses less digits than its factorization.

19942831297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14016062.

The product of its digits is 1959552, while the sum is 55.

The spelling of 19942831297 in words is "nineteen billion, nine hundred forty-two million, eight hundred thirty-one thousand, two hundred ninety-seven".