20053445 has 16 divisors (see below), whose sum is σ = 25133808. Its totient is φ = 15344640.

The previous prime is 20053433. The next prime is 20053457. The reversal of 20053445 is 54435002.

20053445 = 3166² + 3167².

It is an interprime number because it is at equal distance from previous prime (20053433) and next prime (20053457).

It can be written as a sum of positive squares in 8 ways, for example, as 401956 + 19651489 = 634^2 + 4433^2 .

It is not a de Polignac number, because 20053445 - 2¹⁰ = 20052421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20053445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10397 + ... + 12173.

It is an arithmetic number, because the mean of its divisors is an integer number (1570863).

Almost surely, 2^20053445 is an apocalyptic number.

20053445 is the 3167-th centered square number.

It is an amenable number.

20053445 is a deficient number, since it is larger than the sum of its proper divisors (5080363).

20053445 is a wasteful number, since it uses less digits than its factorization.

20053445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 20053445 is about 4478.1073010816. The cubic root of 20053445 is about 271.6833333563.

Adding to 20053445 its reverse (54435002), we get a palindrome (74488447).

The spelling of 20053445 in words is "twenty million, fifty-three thousand, four hundred forty-five".