20445132 has 24 divisors (see below), whose sum is σ = 48154176. Its totient is φ = 6750928.

The previous prime is 20445109. The next prime is 20445143. The reversal of 20445132 is 23154402.

It is a junction number, because it is equal to n+sod(n) for n = 20445099 and 20445108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6678 + ... + 9245.

It is an arithmetic number, because the mean of its divisors is an integer number (2006424).

Almost surely, 2^20445132 is an apocalyptic number.

It is an amenable number.

20445132 is an abundant number, since it is smaller than the sum of its proper divisors (27709044).

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

20445132 is a wasteful number, since it uses less digits than its factorization.

20445132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16037 (or 16035 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20445132 is about 4521.6293523463. The cubic root of 20445132 is about 273.4407938890.

Adding to 20445132 its reverse (23154402), we get a palindrome (43599534).

The spelling of 20445132 in words is "twenty million, four hundred forty-five thousand, one hundred thirty-two".