20244389880 has 256 divisors, whose sum is σ = 71625254400. Its totient is φ = 4512798720.

The previous prime is 20244389873. The next prime is 20244389881. The reversal of 20244389880 is 8898344202.

It is a super-2 number, since 2×20244389880² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20244389881) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4751191 + ... + 4755449.

It is an arithmetic number, because the mean of its divisors is an integer number (279786150).

Almost surely, 2^20244389880 is an apocalyptic number.

20244389880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20244389880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35812627200).

20244389880 is an abundant number, since it is smaller than the sum of its proper divisors (51380864520).

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

20244389880 is a wasteful number, since it uses less digits than its factorization.

20244389880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4574 (or 4570 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 48.

The spelling of 20244389880 in words is "twenty billion, two hundred forty-four million, three hundred eighty-nine thousand, eight hundred eighty".