20544373 has 4 divisors (see below), whose sum is σ = 20881228. Its totient is φ = 20207520.

The previous prime is 20544343. The next prime is 20544389. The reversal of 20544373 is 37344502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8868484 + 11675889 = 2978^2 + 3417^2 .

It is a cyclic number.

It is not a de Polignac number, because 20544373 - 2⁵ = 20544341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20544343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168336 + ... + 168457.

It is an arithmetic number, because the mean of its divisors is an integer number (5220307).

Almost surely, 2^20544373 is an apocalyptic number.

It is an amenable number.

20544373 is a deficient number, since it is larger than the sum of its proper divisors (336855).

20544373 is an equidigital number, since it uses as much as digits as its factorization.

20544373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336854.

The product of its (nonzero) digits is 10080, while the sum is 28.

The square root of 20544373 is about 4532.5900983875. The cubic root of 20544373 is about 273.8825086337.

Adding to 20544373 its reverse (37344502), we get a palindrome (57888875).

The spelling of 20544373 in words is "twenty million, five hundred forty-four thousand, three hundred seventy-three".