22001203220 has 24 divisors (see below), whose sum is σ = 47795718600. Its totient is φ = 8497016192.

The previous prime is 22001203193. The next prime is 22001203261. The reversal of 22001203220 is 2230210022.

It can be written as a sum of positive squares in 4 ways, for example, as 296252944 + 21704950276 = 17212^2 + 147326^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22001203195 and 22001203204.

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 7 ways as a sum of consecutive naturals, for example, 18965975 + ... + 18967134.

It is an arithmetic number, because the mean of its divisors is an integer number (1991488275).

Almost surely, 2^22001203220 is an apocalyptic number.

22001203220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22001203220 is an abundant number, since it is smaller than the sum of its proper divisors (25794515380).

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

22001203220 is a wasteful number, since it uses less digits than its factorization.

22001203220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37933147 (or 37933145 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 22001203220 its reverse (2230210022), we get a palindrome (24231413242).

The spelling of 22001203220 in words is "twenty-two billion, one million, two hundred three thousand, two hundred twenty".