20020045 has 4 divisors (see below), whose sum is σ = 24024060. Its totient is φ = 16016032.

The previous prime is 20020027. The next prime is 20020093. The reversal of 20020045 is 54002002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12369289 + 7650756 = 3517^2 + 2766^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020045 - 2¹¹ = 20017997 is a prime.

It is a congruent number.

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, 2002000 + ... + 2002009.

It is an arithmetic number, because the mean of its divisors is an integer number (6006015).

Almost surely, 2^20020045 is an apocalyptic number.

It is an amenable number.

20020045 is a deficient number, since it is larger than the sum of its proper divisors (4004015).

20020045 is an equidigital number, since it uses as much as digits as its factorization.

20020045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004014.

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 20020045 is about 4474.3764928759. The cubic root of 20020045 is about 271.5324155488.

Adding to 20020045 its reverse (54002002), we get a palindrome (74022047).

The spelling of 20020045 in words is "twenty million, twenty thousand, forty-five".