20206424 has 48 divisors (see below), whose sum is σ = 46409400. Its totient is φ = 8201088.

The previous prime is 20206391. The next prime is 20206427. The reversal of 20206424 is 42460202.

It is a junction number, because it is equal to n+sod(n) for n = 20206396 and 20206405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20206427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6092 + ... + 8804.

Almost surely, 2^20206424 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 20206424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23204700).

20206424 is an abundant number, since it is smaller than the sum of its proper divisors (26202976).

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

20206424 is a wasteful number, since it uses less digits than its factorization.

20206424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2752 (or 2741 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 20206424 is about 4495.1556146590. The cubic root of 20206424 is about 272.3724353129.

Adding to 20206424 its reverse (42460202), we get a palindrome (62666626).

The spelling of 20206424 in words is "twenty million, two hundred six thousand, four hundred twenty-four".