20424352 has 48 divisors (see below), whose sum is σ = 44823240. Its totient is φ = 9096192.

The previous prime is 20424337. The next prime is 20424353. The reversal of 20424352 is 25342402.

It can be written as a sum of positive squares in 4 ways, for example, as 13220496 + 7203856 = 3636^2 + 2684^2 .

It is not an unprimeable number, because it can be changed into a prime (20424353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11218 + ... + 12910.

Almost surely, 2^20424352 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20424352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22411620).

20424352 is an abundant number, since it is smaller than the sum of its proper divisors (24398888).

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

20424352 is a wasteful number, since it uses less digits than its factorization.

20424352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745 (or 1737 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 20424352 is about 4519.3309239311. The cubic root of 20424352 is about 273.3481226713.

Adding to 20424352 its reverse (25342402), we get a palindrome (45766754).

The spelling of 20424352 in words is "twenty million, four hundred twenty-four thousand, three hundred fifty-two".