20011202220 has 96 divisors (see below), whose sum is σ = 58078153728. Its totient is φ = 5144781312.

The previous prime is 20011202219. The next prime is 20011202227. The reversal of 20011202220 is 2220211002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20011202196 and 20011202205.

It is not an unprimeable number, because it can be changed into a prime (20011202227) 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, 135984 + ... + 241896.

It is an arithmetic number, because the mean of its divisors is an integer number (604980768).

Almost surely, 2^20011202220 is an apocalyptic number.

20011202220 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 20011202220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29039076864).

20011202220 is an abundant number, since it is smaller than the sum of its proper divisors (38066951508).

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

20011202220 is a wasteful number, since it uses less digits than its factorization.

20011202220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106039 (or 106037 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20011202220 its reverse (2220211002), we get a palindrome (22231413222).

The spelling of 20011202220 in words is "twenty billion, eleven million, two hundred two thousand, two hundred twenty".