20045132 has 24 divisors (see below), whose sum is σ = 35967120. Its totient is φ = 9771840.

The previous prime is 20045131. The next prime is 20045161. The reversal of 20045132 is 23154002.

It is a zygodrome in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 20045132.

It is not an unprimeable number, because it can be changed into a prime (20045131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36782 + ... + 37322.

It is an arithmetic number, because the mean of its divisors is an integer number (1498630).

Almost surely, 2^20045132 is an apocalyptic number.

It is an amenable number.

20045132 is a deficient number, since it is larger than the sum of its proper divisors (15921988).

20045132 is a wasteful number, since it uses less digits than its factorization.

20045132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761 (or 759 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20045132 is about 4477.1790225543. The cubic root of 20045132 is about 271.6457867618.

Adding to 20045132 its reverse (23154002), we get a palindrome (43199134).

The spelling of 20045132 in words is "twenty million, forty-five thousand, one hundred thirty-two".