22220200820 has 24 divisors (see below), whose sum is σ = 46667577600. Its totient is φ = 8887098272.

The previous prime is 22220200817. The next prime is 22220200837. The reversal of 22220200820 is 2800202222.

It is a super-2 number, since 2×22220200820² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22220200792 and 22220200801.

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, 140321 + ... + 253239.

It is an arithmetic number, because the mean of its divisors is an integer number (1944482400).

Almost surely, 2^22220200820 is an apocalyptic number.

22220200820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22220200820 is an abundant number, since it is smaller than the sum of its proper divisors (24447376780).

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

22220200820 is a wasteful number, since it uses less digits than its factorization.

22220200820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122767 (or 122765 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The spelling of 22220200820 in words is "twenty-two billion, two hundred twenty million, two hundred thousand, eight hundred twenty".