20044051220 has 24 divisors (see below), whose sum is σ = 43543974600. Its totient is φ = 7741150592.

The previous prime is 20044051213. The next prime is 20044051267. The reversal of 20044051220 is 2215044002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42172036 + 20001879184 = 6494^2 + 141428^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20044051192 and 20044051201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17278775 + ... + 17279934.

It is an arithmetic number, because the mean of its divisors is an integer number (1814332275).

Almost surely, 2^20044051220 is an apocalyptic number.

20044051220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20044051220 is an abundant number, since it is smaller than the sum of its proper divisors (23499923380).

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

20044051220 is a wasteful number, since it uses less digits than its factorization.

20044051220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34558747 (or 34558745 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 20044051220 its reverse (2215044002), we get a palindrome (22259095222).

The spelling of 20044051220 in words is "twenty billion, forty-four million, fifty-one thousand, two hundred twenty".