20043313 has 4 divisors (see below), whose sum is σ = 20057380. Its totient is φ = 20029248.

The previous prime is 20043311. The next prime is 20043337. The reversal of 20043313 is 31334002.

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 18386944 + 1656369 = 4288^2 + 1287^2 .

It is a cyclic number.

It is not a de Polignac number, because 20043313 - 2¹ = 20043311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20043311) 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, 4620 + ... + 7837.

It is an arithmetic number, because the mean of its divisors is an integer number (5014345).

Almost surely, 2^20043313 is an apocalyptic number.

It is an amenable number.

20043313 is a deficient number, since it is larger than the sum of its proper divisors (14067).

20043313 is a wasteful number, since it uses less digits than its factorization.

20043313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14066.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 20043313 is about 4476.9758766382. The cubic root of 20043313 is about 271.6375696606.

Adding to 20043313 its product of nonzero digits (216), we get a square (20043529 = 4477²).

Adding to 20043313 its reverse (31334002), we get a palindrome (51377315).

The spelling of 20043313 in words is "twenty million, forty-three thousand, three hundred thirteen".