20445332 has 12 divisors (see below), whose sum is σ = 36041460. Its totient is φ = 10147776.

The previous prime is 20445323. The next prime is 20445353. The reversal of 20445332 is 23354402.

It can be written as a sum of positive squares in 2 ways, for example, as 10995856 + 9449476 = 3316^2 + 3074^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20445298 and 20445307.

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, 18107 + ... + 19202.

It is an arithmetic number, because the mean of its divisors is an integer number (3003455).

Almost surely, 2^20445332 is an apocalyptic number.

It is an amenable number.

20445332 is a deficient number, since it is larger than the sum of its proper divisors (15596128).

20445332 is a wasteful number, since it uses less digits than its factorization.

20445332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37450 (or 37448 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 20445332 is about 4521.6514682138. The cubic root of 20445332 is about 273.4416855109.

Adding to 20445332 its reverse (23354402), we get a palindrome (43799734).

The spelling of 20445332 in words is "twenty million, four hundred forty-five thousand, three hundred thirty-two".