20443124 has 12 divisors (see below), whose sum is σ = 38527524. Its totient is φ = 9435264.

The previous prime is 20443123. The next prime is 20443141. The reversal of 20443124 is 42134402.

It can be written as a sum of positive squares in 2 ways, for example, as 4919524 + 15523600 = 2218^2 + 3940^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20443096 and 20443105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20443123) 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, 196517 + ... + 196620.

It is an arithmetic number, because the mean of its divisors is an integer number (3210627).

Almost surely, 2^20443124 is an apocalyptic number.

It is an amenable number.

20443124 is a deficient number, since it is larger than the sum of its proper divisors (18084400).

20443124 is a wasteful number, since it uses less digits than its factorization.

20443124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393154 (or 393152 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 20443124 is about 4521.4073030418. The cubic root of 20443124 is about 273.4318416832.

Adding to 20443124 its reverse (42134402), we get a palindrome (62577526).

The spelling of 20443124 in words is "twenty million, four hundred forty-three thousand, one hundred twenty-four".