20224143 has 6 divisors (see below), whose sum is σ = 29212664. Its totient is φ = 13482756.

The previous prime is 20224133. The next prime is 20224157. The reversal of 20224143 is 34142202.

It is a de Polignac number, because none of the positive numbers 2^k-20224143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20224133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1123555 + ... + 1123572.

Almost surely, 2^20224143 is an apocalyptic number.

20224143 is a deficient number, since it is larger than the sum of its proper divisors (8988521).

20224143 is a wasteful number, since it uses less digits than its factorization.

20224143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2247133 (or 2247130 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 20224143 is about 4497.1260822886. The cubic root of 20224143 is about 272.4520264564.

Adding to 20224143 its reverse (34142202), we get a palindrome (54366345).

The spelling of 20224143 in words is "twenty million, two hundred twenty-four thousand, one hundred forty-three".