22532420 has 48 divisors (see below), whose sum is σ = 49941360. Its totient is φ = 8526336.

The previous prime is 22532417. The next prime is 22532431. The reversal of 22532420 is 2423522.

It can be written as a sum of positive squares in 8 ways, for example, as 3013696 + 19518724 = 1736^2 + 4418^2 .

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 = 22532392 and 22532401.

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, 30374 + ... + 31106.

It is an arithmetic number, because the mean of its divisors is an integer number (1040445).

Almost surely, 2^22532420 is an apocalyptic number.

22532420 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 22532420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24970680).

22532420 is an abundant number, since it is smaller than the sum of its proper divisors (27408940).

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

22532420 is a wasteful number, since it uses less digits than its factorization.

22532420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 822 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 22532420 is about 4746.8326281848. The cubic root of 22532420 is about 282.4463364275.

Adding to 22532420 its reverse (2423522), we get a palindrome (24955942).

The spelling of 22532420 in words is "twenty-two million, five hundred thirty-two thousand, four hundred twenty".