20424020020 has 48 divisors (see below), whose sum is σ = 43698907728. Its totient is φ = 8017049600.

The previous prime is 20424019949. The next prime is 20424020041. The reversal of 20424020020 is 2002042402.

It can be written as a sum of positive squares in 8 ways, for example, as 4437957924 + 15986062096 = 66618^2 + 126436^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20424019976 and 20424020003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183522 + ... + 272998.

It is an arithmetic number, because the mean of its divisors is an integer number (910393911).

Almost surely, 2^20424020020 is an apocalyptic number.

20424020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20424020020 is an abundant number, since it is smaller than the sum of its proper divisors (23274887708).

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

20424020020 is a wasteful number, since it uses less digits than its factorization.

20424020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89700 (or 89698 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 20424020020 its reverse (2002042402), we get a palindrome (22426062422).

The spelling of 20424020020 in words is "twenty billion, four hundred twenty-four million, twenty thousand, twenty".