20443313 has 12 divisors (see below), whose sum is σ = 22695120. Its totient is φ = 18399480.

The previous prime is 20443301. The next prime is 20443331. The reversal of 20443313 is 31334402.

It is not a de Polignac number, because 20443313 - 2⁶ = 20443249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20443363) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12158 + ... + 13736.

It is an arithmetic number, because the mean of its divisors is an integer number (1891260).

Almost surely, 2^20443313 is an apocalyptic number.

It is an amenable number.

20443313 is a deficient number, since it is larger than the sum of its proper divisors (2251807).

20443313 is a wasteful number, since it uses less digits than its factorization.

20443313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708 (or 1697 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 20443313 is about 4521.4282035658. The cubic root of 20443313 is about 273.4326843212.

Adding to 20443313 its reverse (31334402), we get a palindrome (51777715).

The spelling of 20443313 in words is "twenty million, four hundred forty-three thousand, three hundred thirteen".