20424133 has 12 divisors (see below), whose sum is σ = 21556044. Its totient is φ = 19344000.

The previous prime is 20424113. The next prime is 20424137. The reversal of 20424133 is 33142402.

It can be written as a sum of positive squares in 2 ways, for example, as 18301284 + 2122849 = 4278^2 + 1457^2 .

It is not a de Polignac number, because 20424133 - 2⁵ = 20424101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20424133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50733 + ... + 51133.

It is an arithmetic number, because the mean of its divisors is an integer number (1796337).

Almost surely, 2^20424133 is an apocalyptic number.

It is an amenable number.

20424133 is a deficient number, since it is larger than the sum of its proper divisors (1131911).

20424133 is an equidigital number, since it uses as much as digits as its factorization.

20424133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 20424133 is about 4519.3066946159. The cubic root of 20424133 is about 273.3471456765.

Adding to 20424133 its reverse (33142402), we get a palindrome (53566535).

The spelling of 20424133 in words is "twenty million, four hundred twenty-four thousand, one hundred thirty-three".