19800373 has 2 divisors, whose sum is σ = 19800374. Its totient is φ = 19800372.

The previous prime is 19800371. The next prime is 19800377. The reversal of 19800373 is 37300891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18722929 + 1077444 = 4327^2 + 1038^2 .

It is a cyclic number.

It is not a de Polignac number, because 19800373 - 2¹ = 19800371 is a prime.

Together with 19800371, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19800371) 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, 9900186 + 9900187.

It is an arithmetic number, because the mean of its divisors is an integer number (9900187).

Almost surely, 2^19800373 is an apocalyptic number.

It is an amenable number.

19800373 is a deficient number, since it is larger than the sum of its proper divisors (1).

19800373 is an equidigital number, since it uses as much as digits as its factorization.

19800373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 19800373 is about 4449.7610048181. The cubic root of 19800373 is about 270.5356216962.

The spelling of 19800373 in words is "nineteen million, eight hundred thousand, three hundred seventy-three".