20850649344 has 270 divisors, whose sum is σ = 72327059574. Its totient is φ = 5957038080.

The previous prime is 20850649327. The next prime is 20850649357. The reversal of 20850649344 is 44394605802.

It can be written as a sum of positive squares in only one way, i.e., 18793119744 + 2057529600 = 137088^2 + 45360^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20850649344.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1005804 + ... + 1026324.

Almost surely, 2^20850649344 is an apocalyptic number.

20850649344 is a gapful number since it is divisible by the number (24) 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 20850649344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36163529787).

20850649344 is an abundant number, since it is smaller than the sum of its proper divisors (51476410230).

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

20850649344 is an equidigital number, since it uses as much as digits as its factorization.

20850649344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20563 (or 20533 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 20850649344 in words is "twenty billion, eight hundred fifty million, six hundred forty-nine thousand, three hundred forty-four".