20835813222 has 120 divisors (see below), whose sum is σ = 56183513760. Its totient is φ = 5747747040.

The previous prime is 20835813149. The next prime is 20835813233. The reversal of 20835813222 is 22231853802.

It is a happy number.

20835813222 is a `hidden beast` number, since 20 + 8 + 3 + 581 + 32 + 22 = 666.

It is a super-2 number, since 2×20835813222² (a number of 21 digits) contains 22 as substring.

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 59 ways as a sum of consecutive naturals, for example, 184947 + ... + 275457.

It is an arithmetic number, because the mean of its divisors is an integer number (468195948).

Almost surely, 2^20835813222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20835813222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28091756880).

20835813222 is an abundant number, since it is smaller than the sum of its proper divisors (35347700538).

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

20835813222 is a wasteful number, since it uses less digits than its factorization.

20835813222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90568 (or 90552 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 20835813222 in words is "twenty billion, eight hundred thirty-five million, eight hundred thirteen thousand, two hundred twenty-two".