20424276 has 72 divisors (see below), whose sum is σ = 57081024. Its totient is φ = 6124800.

The previous prime is 20424263. The next prime is 20424277. The reversal of 20424276 is 67242402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13351 + ... + 14801.

It is an arithmetic number, because the mean of its divisors is an integer number (792792).

Almost surely, 2^20424276 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 20424276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28540512).

20424276 is an abundant number, since it is smaller than the sum of its proper divisors (36656748).

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

20424276 is a wasteful number, since it uses less digits than its factorization.

20424276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501 (or 1496 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 20424276 is about 4519.3225155990. The cubic root of 20424276 is about 273.3477836236.

Adding to 20424276 its reverse (67242402), we get a palindrome (87666678).

The spelling of 20424276 in words is "twenty million, four hundred twenty-four thousand, two hundred seventy-six".