22020020 has 48 divisors (see below), whose sum is σ = 50996736. Its totient is φ = 7920000.

The previous prime is 22019989. The next prime is 22020023. The reversal of 22020020 is 2002022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22020023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21725 + ... + 22715.

It is an arithmetic number, because the mean of its divisors is an integer number (1062432).

Almost surely, 2^22020020 is an apocalyptic number.

22020020 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 22020020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25498368).

22020020 is an abundant number, since it is smaller than the sum of its proper divisors (28976716).

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

22020020 is a wasteful number, since it uses less digits than its factorization.

22020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112 (or 1110 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 8.

The square root of 22020020 is about 4692.5494136983. The cubic root of 22020020 is about 280.2889024897.

Adding to 22020020 its reverse (2002022), we get a palindrome (24022042).

The spelling of 22020020 in words is "twenty-two million, twenty thousand, twenty".