20563373 has 2 divisors, whose sum is σ = 20563374. Its totient is φ = 20563372.

The previous prime is 20563369. The next prime is 20563381. The reversal of 20563373 is 37336502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17330569 + 3232804 = 4163^2 + 1798^2 .

It is a cyclic number.

It is not a de Polignac number, because 20563373 - 2² = 20563369 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 (20563313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10281686 + 10281687.

It is an arithmetic number, because the mean of its divisors is an integer number (10281687).

Almost surely, 2^20563373 is an apocalyptic number.

It is an amenable number.

20563373 is a deficient number, since it is larger than the sum of its proper divisors (1).

20563373 is an equidigital number, since it uses as much as digits as its factorization.

20563373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 29.

The square root of 20563373 is about 4534.6855458786. The cubic root of 20563373 is about 273.9669139725.

Adding to 20563373 its reverse (37336502), we get a palindrome (57899875).

The spelling of 20563373 in words is "twenty million, five hundred sixty-three thousand, three hundred seventy-three".