20105022222 has 24 divisors (see below), whose sum is σ = 46123286976. Its totient is φ = 6307457856.

The previous prime is 20105022167. The next prime is 20105022227. The reversal of 20105022222 is 22222050102.

It is a super-2 number, since 2×20105022222² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20105022195 and 20105022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20105022227) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 32851038 + ... + 32851649.

It is an arithmetic number, because the mean of its divisors is an integer number (1921803624).

Almost surely, 2^20105022222 is an apocalyptic number.

20105022222 is an abundant number, since it is smaller than the sum of its proper divisors (26018264754).

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

20105022222 is a wasteful number, since it uses less digits than its factorization.

20105022222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65702712 (or 65702709 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

Adding to 20105022222 its reverse (22222050102), we get a palindrome (42327072324).

The spelling of 20105022222 in words is "twenty billion, one hundred five million, twenty-two thousand, two hundred twenty-two".