20844227880 has 256 divisors, whose sum is σ = 79850534400. Its totient is φ = 4737761280.

The previous prime is 20844227869. The next prime is 20844227897. The reversal of 20844227880 is 8872244802.

20844227880 is a `hidden beast` number, since 2 + 0 + 84 + 422 + 78 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1360744 + ... + 1375976.

It is an arithmetic number, because the mean of its divisors is an integer number (311916150).

Almost surely, 2^20844227880 is an apocalyptic number.

20844227880 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 20844227880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39925267200).

20844227880 is an abundant number, since it is smaller than the sum of its proper divisors (59006306520).

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

20844227880 is a wasteful number, since it uses less digits than its factorization.

20844227880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15441 (or 15431 counting only the distinct ones).

The product of its (nonzero) digits is 458752, while the sum is 45.

The spelling of 20844227880 in words is "twenty billion, eight hundred forty-four million, two hundred twenty-seven thousand, eight hundred eighty".