20024420 has 24 divisors (see below), whose sum is σ = 45286584. Its totient is φ = 7393536.

The previous prime is 20024339. The next prime is 20024483. The reversal of 20024420 is 2442002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3247204 + 16777216 = 1802^2 + 4096^2 .

20024420 is a modest number, since divided by 24420 gives 20 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 20024395 and 20024404.

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, 38249 + ... + 38768.

It is an arithmetic number, because the mean of its divisors is an integer number (1886941).

Almost surely, 2^20024420 is an apocalyptic number.

20024420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20024420 is an abundant number, since it is smaller than the sum of its proper divisors (25262164).

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

20024420 is a wasteful number, since it uses less digits than its factorization.

20024420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77039 (or 77037 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 20024420 is about 4474.8653611031. The cubic root of 20024420 is about 271.5521935229.

Adding to 20024420 its reverse (2442002), we get a palindrome (22466422).

The spelling of 20024420 in words is "twenty million, twenty-four thousand, four hundred twenty".