20043045 has 60 divisors (see below), whose sum is σ = 39588780. Its totient is φ = 9694080.

The previous prime is 20043007. The next prime is 20043053. The reversal of 20043045 is 54034002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13417569 + 6625476 = 3663^2 + 2574^2 .

It is not a de Polignac number, because 20043045 - 2⁷ = 20042917 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 48801 + ... + 49209.

It is an arithmetic number, because the mean of its divisors is an integer number (659813).

Almost surely, 2^20043045 is an apocalyptic number.

It is an amenable number.

20043045 is a deficient number, since it is larger than the sum of its proper divisors (19545735).

20043045 is a wasteful number, since it uses less digits than its factorization.

20043045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448 (or 428 counting only the distinct ones).

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

The square root of 20043045 is about 4476.9459456196. The cubic root of 20043045 is about 271.6363589627.

Adding to 20043045 its reverse (54034002), we get a palindrome (74077047).

The spelling of 20043045 in words is "twenty million, forty-three thousand, forty-five".