20005532 has 12 divisors (see below), whose sum is σ = 37069200. Its totient is φ = 9414336.

The previous prime is 20005529. The next prime is 20005541. The reversal of 20005532 is 23550002.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 20005532.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147032 + ... + 147167.

It is an arithmetic number, because the mean of its divisors is an integer number (3089100).

Almost surely, 2^20005532 is an apocalyptic number.

It is an amenable number.

20005532 is a deficient number, since it is larger than the sum of its proper divisors (17063668).

20005532 is a wasteful number, since it uses less digits than its factorization.

20005532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294220 (or 294218 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 20005532 is about 4472.7544086390. The cubic root of 20005532 is about 271.4667862828.

Adding to 20005532 its reverse (23550002), we get a palindrome (43555534).

The spelling of 20005532 in words is "twenty million, five thousand, five hundred thirty-two".