20204045 has 8 divisors (see below), whose sum is σ = 24270840. Its totient is φ = 16145920.

The previous prime is 20204029. The next prime is 20204047. The reversal of 20204045 is 54040202.

It can be written as a sum of positive squares in 4 ways, for example, as 896809 + 19307236 = 947^2 + 4394^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20204045 - 2⁴ = 20204029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20204047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5321 + ... + 8289.

It is an arithmetic number, because the mean of its divisors is an integer number (3033855).

Almost surely, 2^20204045 is an apocalyptic number.

It is an amenable number.

20204045 is a deficient number, since it is larger than the sum of its proper divisors (4066795).

20204045 is a wasteful number, since it uses less digits than its factorization.

20204045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4335.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 20204045 is about 4494.8909886670. The cubic root of 20204045 is about 272.3617456521.

Adding to 20204045 its reverse (54040202), we get a palindrome (74244247).

The spelling of 20204045 in words is "twenty million, two hundred four thousand, forty-five".