20544045 has 16 divisors (see below), whose sum is σ = 33012672. Its totient is φ = 10909440.

The previous prime is 20544023. The next prime is 20544047. The reversal of 20544045 is 54044502.

It is not a de Polignac number, because 20544045 - 2¹⁶ = 20478509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20544047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 774 + ... + 6456.

It is an arithmetic number, because the mean of its divisors is an integer number (2063292).

Almost surely, 2^20544045 is an apocalyptic number.

It is an amenable number.

20544045 is a deficient number, since it is larger than the sum of its proper divisors (12468627).

20544045 is a wasteful number, since it uses less digits than its factorization.

20544045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5932.

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 20544045 is about 4532.5539158404. The cubic root of 20544045 is about 273.8810510742.

Subtracting from 20544045 its product of nonzero digits (3200), we obtain a triangular number (20540845 = T₆₄₀₉).

Adding to 20544045 its reverse (54044502), we get a palindrome (74588547).

The spelling of 20544045 in words is "twenty million, five hundred forty-four thousand, forty-five".