20131373 has 2 divisors, whose sum is σ = 20131374. Its totient is φ = 20131372.

The previous prime is 20131339. The next prime is 20131379. The reversal of 20131373 is 37313102.

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., 10259209 + 9872164 = 3203^2 + 3142^2 .

It is a cyclic number.

It is not a de Polignac number, because 20131373 - 2⁸ = 20131117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20131379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10065686 + 10065687.

It is an arithmetic number, because the mean of its divisors is an integer number (10065687).

Almost surely, 2^20131373 is an apocalyptic number.

It is an amenable number.

20131373 is a deficient number, since it is larger than the sum of its proper divisors (1).

20131373 is an equidigital number, since it uses as much as digits as its factorization.

20131373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 20.

The square root of 20131373 is about 4486.7998618169. The cubic root of 20131373 is about 272.0348003700.

Adding to 20131373 its reverse (37313102), we get a palindrome (57444475).

The spelling of 20131373 in words is "twenty million, one hundred thirty-one thousand, three hundred seventy-three".