19842313 has 2 divisors, whose sum is σ = 19842314. Its totient is φ = 19842312.

The previous prime is 19842271. The next prime is 19842367. The reversal of 19842313 is 31324891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10188864 + 9653449 = 3192^2 + 3107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19842313 is a prime.

It is not a weakly prime, because it can be changed into another prime (19812313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9921156 + 9921157.

It is an arithmetic number, because the mean of its divisors is an integer number (9921157).

Almost surely, 2^19842313 is an apocalyptic number.

It is an amenable number.

19842313 is a deficient number, since it is larger than the sum of its proper divisors (1).

19842313 is an equidigital number, since it uses as much as digits as its factorization.

19842313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 19842313 is about 4454.4711246118. The cubic root of 19842313 is about 270.7264979385.

The spelling of 19842313 in words is "nineteen million, eight hundred forty-two thousand, three hundred thirteen".