20030445 has 24 divisors (see below), whose sum is σ = 35919000. Its totient is φ = 10313856.

The previous prime is 20030443. The next prime is 20030453. The reversal of 20030445 is 54403002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1212201 + 18818244 = 1101^2 + 4338^2 .

It is not a de Polignac number, because 20030445 - 2¹ = 20030443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20030443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6370 + ... + 8979.

It is an arithmetic number, because the mean of its divisors is an integer number (1496625).

Almost surely, 2^20030445 is an apocalyptic number.

It is an amenable number.

20030445 is a deficient number, since it is larger than the sum of its proper divisors (15888555).

20030445 is a wasteful number, since it uses less digits than its factorization.

20030445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15389 (or 15386 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 20030445 is about 4475.5385150840. The cubic root of 20030445 is about 271.5794259039.

Adding to 20030445 its reverse (54403002), we get a palindrome (74433447).

The spelling of 20030445 in words is "twenty million, thirty thousand, four hundred forty-five".