19993120202423 has 2 divisors, whose sum is σ = 19993120202424. Its totient is φ = 19993120202422.

The previous prime is 19993120202389. The next prime is 19993120202453. The reversal of 19993120202423 is 32420202139991.

It is a strong prime.

It is an emirp because it is prime and its reverse (32420202139991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19993120202423 - 2²² = 19993116008119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19993120202453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9996560101211 + 9996560101212.

It is an arithmetic number, because the mean of its divisors is an integer number (9996560101212).

Almost surely, 2^{19993120202423} is an apocalyptic number.

19993120202423 is a deficient number, since it is larger than the sum of its proper divisors (1).

19993120202423 is an equidigital number, since it uses as much as digits as its factorization.

19993120202423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 47.

The spelling of 19993120202423 in words is "nineteen trillion, nine hundred ninety-three billion, one hundred twenty million, two hundred two thousand, four hundred twenty-three".