22037220 has 72 divisors (see below), whose sum is σ = 69765696. Its totient is φ = 5620032.

The previous prime is 22037209. The next prime is 22037221. The reversal of 22037220 is 2273022.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22037193 and 22037202.

It is not an unprimeable number, because it can be changed into a prime (22037221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1479 + ... + 6801.

It is an arithmetic number, because the mean of its divisors is an integer number (968968).

Almost surely, 2^22037220 is an apocalyptic number.

22037220 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 22037220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34882848).

22037220 is an abundant number, since it is smaller than the sum of its proper divisors (47728476).

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

22037220 is a wasteful number, since it uses less digits than its factorization.

22037220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5361 (or 5356 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 22037220 is about 4694.3817484308. The cubic root of 22037220 is about 280.3618620728.

The spelling of 22037220 in words is "twenty-two million, thirty-seven thousand, two hundred twenty".