22032540 has 48 divisors (see below), whose sum is σ = 68547360. Its totient is φ = 5875200.

The previous prime is 22032511. The next prime is 22032541. The reversal of 22032540 is 4523022.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22032541) 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, 19861 + ... + 20940.

It is an arithmetic number, because the mean of its divisors is an integer number (1428070).

Almost surely, 2^22032540 is an apocalyptic number.

22032540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22032540 is an abundant number, since it is smaller than the sum of its proper divisors (46514820).

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

22032540 is a wasteful number, since it uses less digits than its factorization.

22032540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40819 (or 40811 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 22032540 is about 4693.8832537676. The cubic root of 22032540 is about 280.3420140398.

Adding to 22032540 its reverse (4523022), we get a palindrome (26555562).

The spelling of 22032540 in words is "twenty-two million, thirty-two thousand, five hundred forty".