20043872 has 24 divisors (see below), whose sum is σ = 40824000. Its totient is φ = 9675904.

The previous prime is 20043871. The next prime is 20043913. The reversal of 20043872 is 27834002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20043871) 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, 9872 + ... + 11727.

It is an arithmetic number, because the mean of its divisors is an integer number (1701000).

Almost surely, 2^20043872 is an apocalyptic number.

It is an amenable number.

20043872 is an abundant number, since it is smaller than the sum of its proper divisors (20780128).

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

20043872 is a wasteful number, since it uses less digits than its factorization.

20043872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21638 (or 21630 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 20043872 is about 4477.0383067381. The cubic root of 20043872 is about 271.6400949249.

Adding to 20043872 its reverse (27834002), we get a palindrome (47877874).

The spelling of 20043872 in words is "twenty million, forty-three thousand, eight hundred seventy-two".