20445064 has 16 divisors (see below), whose sum is σ = 40352400. Its totient is φ = 9684432.

The previous prime is 20445041. The next prime is 20445071. The reversal of 20445064 is 46054402.

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, 67102 + ... + 67405.

It is an arithmetic number, because the mean of its divisors is an integer number (2522025).

Almost surely, 2^20445064 is an apocalyptic number.

It is an amenable number.

20445064 is a deficient number, since it is larger than the sum of its proper divisors (19907336).

20445064 is a wasteful number, since it uses less digits than its factorization.

20445064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134532 (or 134528 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 20445064 is about 4521.6218329268. The cubic root of 20445064 is about 273.4404907363.

Adding to 20445064 its reverse (46054402), we get a palindrome (66499466).

The spelling of 20445064 in words is "twenty million, four hundred forty-five thousand, sixty-four".