20244400220 has 24 divisors (see below), whose sum is σ = 46378081008. Its totient is φ = 7361600000.

The previous prime is 20244400181. The next prime is 20244400237. The reversal of 20244400220 is 2200444202.

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 = 20244400192 and 20244400201.

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, 46009781 + ... + 46010220.

It is an arithmetic number, because the mean of its divisors is an integer number (1932420042).

Almost surely, 2^20244400220 is an apocalyptic number.

20244400220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20244400220 is an abundant number, since it is smaller than the sum of its proper divisors (26133680788).

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

20244400220 is a wasteful number, since it uses less digits than its factorization.

20244400220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92020021 (or 92020019 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 20244400220 its reverse (2200444202), we get a palindrome (22444844422).

The spelling of 20244400220 in words is "twenty billion, two hundred forty-four million, four hundred thousand, two hundred twenty".