19974616373 has 2 divisors, whose sum is σ = 19974616374. Its totient is φ = 19974616372.

The previous prime is 19974616307. The next prime is 19974616391. The reversal of 19974616373 is 37361647991.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14544842404 + 5429773969 = 120602^2 + 73687^2 .

It is an emirp because it is prime and its reverse (37361647991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19974616373 - 2⁸ = 19974616117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19974016373) 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 as a sum of consecutive naturals, namely, 9987308186 + 9987308187.

It is an arithmetic number, because the mean of its divisors is an integer number (9987308187).

Almost surely, 2^19974616373 is an apocalyptic number.

It is an amenable number.

19974616373 is a deficient number, since it is larger than the sum of its proper divisors (1).

19974616373 is an equidigital number, since it uses as much as digits as its factorization.

19974616373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5143824, while the sum is 56.

The spelling of 19974616373 in words is "nineteen billion, nine hundred seventy-four million, six hundred sixteen thousand, three hundred seventy-three".