20024020 has 24 divisors (see below), whose sum is σ = 42240744. Its totient is φ = 7973376.

The previous prime is 20024009. The next prime is 20024077. The reversal of 20024020 is 2042002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 646416 + 19377604 = 804^2 + 4402^2 .

It is a super-2 number, since 2×20024020² = 801922753920800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20023988 and 20024006.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2512 + ... + 6808.

It is an arithmetic number, because the mean of its divisors is an integer number (1760031).

Almost surely, 2^20024020 is an apocalyptic number.

20024020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20024020 is an abundant number, since it is smaller than the sum of its proper divisors (22216724).

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

20024020 is a wasteful number, since it uses less digits than its factorization.

20024020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4539 (or 4537 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 20024020 is about 4474.8206667977. The cubic root of 20024020 is about 271.5503853706.

Adding to 20024020 its reverse (2042002), we get a palindrome (22066022).

The spelling of 20024020 in words is "twenty million, twenty-four thousand, twenty".