20424234 has 16 divisors (see below), whose sum is σ = 41148288. Its totient is φ = 6758112.

The previous prime is 20424199. The next prime is 20424247. The reversal of 20424234 is 43242402.

It is a super-3 number, since 3×20424234³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20424234.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11602 + ... + 13245.

It is an arithmetic number, because the mean of its divisors is an integer number (2571768).

Almost surely, 2^20424234 is an apocalyptic number.

20424234 is an abundant number, since it is smaller than the sum of its proper divisors (20724054).

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

20424234 is a wasteful number, since it uses less digits than its factorization.

20424234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24989.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 20424234 is about 4519.3178688824. The cubic root of 20424234 is about 273.3475962549.

Adding to 20424234 its reverse (43242402), we get a palindrome (63666636).

The spelling of 20424234 in words is "twenty million, four hundred twenty-four thousand, two hundred thirty-four".