20056443 has 16 divisors (see below), whose sum is σ = 29376000. Its totient is φ = 12070880.

The previous prime is 20056433. The next prime is 20056453. The reversal of 20056443 is 34465002.

20056443 is nontrivially palindromic in base 13.

It is an interprime number because it is at equal distance from previous prime (20056433) and next prime (20056453).

It is a cyclic number.

It is not a de Polignac number, because 20056443 - 2⁴ = 20056427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20056403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2878 + ... + 6956.

It is an arithmetic number, because the mean of its divisors is an integer number (1836000).

Almost surely, 2^20056443 is an apocalyptic number.

20056443 is a deficient number, since it is larger than the sum of its proper divisors (9319557).

20056443 is a wasteful number, since it uses less digits than its factorization.

20056443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4242.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 20056443 is about 4478.4420282058. The cubic root of 20056443 is about 271.6968716128.

It can be divided in two parts, 2005 and 6443, that added together give a palindrome (8448).

The spelling of 20056443 in words is "twenty million, fifty-six thousand, four hundred forty-three".