22212020 has 48 divisors (see below), whose sum is σ = 49230720. Its totient is φ = 8401536.

The previous prime is 22212019. The next prime is 22212049. The reversal of 22212020 is 2021222.

It is a junction number, because it is equal to n+sod(n) for n = 22211992 and 22212010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49919 + ... + 50361.

It is an arithmetic number, because the mean of its divisors is an integer number (1025640).

Almost surely, 2^22212020 is an apocalyptic number.

22212020 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 22212020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24615360).

22212020 is an abundant number, since it is smaller than the sum of its proper divisors (27018700).

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

22212020 is a wasteful number, since it uses less digits than its factorization.

22212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584 (or 582 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 22212020 is about 4712.9629746053. The cubic root of 22212020 is about 281.1011907440.

Adding to 22212020 its reverse (2021222), we get a palindrome (24233242).

The spelling of 22212020 in words is "twenty-two million, two hundred twelve thousand, twenty".