22005732 has 24 divisors (see below), whose sum is σ = 58682176. Its totient is φ = 6287328.

The previous prime is 22005719. The next prime is 22005749. The reversal of 22005732 is 23750022.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 22005699 and 22005708.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130903 + ... + 131070.

Almost surely, 2^22005732 is an apocalyptic number.

It is an amenable number.

22005732 is an abundant number, since it is smaller than the sum of its proper divisors (36676444).

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

22005732 is a wasteful number, since it uses less digits than its factorization.

22005732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261987 (or 261985 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 22005732 is about 4691.0267532812. The cubic root of 22005732 is about 280.2282662394.

Adding to 22005732 its reverse (23750022), we get a palindrome (45755754).

The spelling of 22005732 in words is "twenty-two million, five thousand, seven hundred thirty-two".