22020012 has 180 divisors, whose sum is σ = 71452920. Its totient is φ = 5878656.

The previous prime is 22019989. The next prime is 22020023. The reversal of 22020012 is 21002022.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 22019976 and 22020003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 301608 + ... + 301680.

Almost surely, 2^22020012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22020012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35726460).

22020012 is an abundant number, since it is smaller than the sum of its proper divisors (49432908).

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

22020012 is a wasteful number, since it uses less digits than its factorization.

22020012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 22020012 is about 4692.5485612831. The cubic root of 22020012 is about 280.2888685462.

Adding to 22020012 its reverse (21002022), we get a palindrome (43022034).

The spelling of 22020012 in words is "twenty-two million, twenty thousand, twelve".