20424500 has 24 divisors (see below), whose sum is σ = 44608200. Its totient is φ = 8169600.

The previous prime is 20424493. The next prime is 20424511. The reversal of 20424500 is 542402.

It can be written as a sum of positive squares in 4 ways, for example, as 300304 + 20124196 = 548^2 + 4486^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19925 + ... + 20924.

It is an arithmetic number, because the mean of its divisors is an integer number (1858675).

Almost surely, 2^20424500 is an apocalyptic number.

20424500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20424500 is an abundant number, since it is smaller than the sum of its proper divisors (24183700).

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

20424500 is a wasteful number, since it uses less digits than its factorization.

20424500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40868 (or 40856 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 20424500 is about 4519.3472980066. The cubic root of 20424500 is about 273.3487829194.

Adding to 20424500 its reverse (542402), we get a palindrome (20966902).

The spelling of 20424500 in words is "twenty million, four hundred twenty-four thousand, five hundred".