20043306 has 36 divisors (see below), whose sum is σ = 46143942. Its totient is φ = 6286464.

The previous prime is 20043269. The next prime is 20043311. The reversal of 20043306 is 60334002.

It can be written as a sum of positive squares in 3 ways, for example, as 18844281 + 1199025 = 4341^2 + 1095^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3276 + ... + 7128.

Almost surely, 2^20043306 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20043306, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23071971).

20043306 is an abundant number, since it is smaller than the sum of its proper divisors (26100636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20043306 is a wasteful number, since it uses less digits than its factorization.

20043306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3895 (or 3875 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 20043306 is about 4476.9750948604. The cubic root of 20043306 is about 271.6375380381.

Adding to 20043306 its reverse (60334002), we get a palindrome (80377308).

The spelling of 20043306 in words is "twenty million, forty-three thousand, three hundred six".