20055222 has 64 divisors (see below), whose sum is σ = 51206400. Its totient is φ = 5754240.

The previous prime is 20055199. The next prime is 20055227. The reversal of 20055222 is 22255002.

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 = 20055195 and 20055204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20055227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10398 + ... + 12174.

It is an arithmetic number, because the mean of its divisors is an integer number (800100).

Almost surely, 2^20055222 is an apocalyptic number.

20055222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20055222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25603200).

20055222 is an abundant number, since it is smaller than the sum of its proper divisors (31151178).

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

20055222 is a wasteful number, since it uses less digits than its factorization.

20055222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818 (or 1812 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 20055222 is about 4478.3057064028. The cubic root of 20055222 is about 271.6913580294.

It can be divided in two parts, 200552 and 22, that multiplied together give a palindrome (4412144).

The spelling of 20055222 in words is "twenty million, fifty-five thousand, two hundred twenty-two".