20004040205 has 16 divisors (see below), whose sum is σ = 24051870000. Its totient is φ = 15971923968.

The previous prime is 20004040141. The next prime is 20004040241. The reversal of 20004040205 is 50204040002.

It can be written as a sum of positive squares in 8 ways, for example, as 400120009 + 19603920196 = 20003^2 + 140014^2 .

It is a cyclic number.

It is not a de Polignac number, because 20004040205 - 2⁶ = 20004040141 is a prime.

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, 8573219 + ... + 8575551.

It is an arithmetic number, because the mean of its divisors is an integer number (1503241875).

Almost surely, 2^20004040205 is an apocalyptic number.

It is an amenable number.

20004040205 is a deficient number, since it is larger than the sum of its proper divisors (4047829795).

20004040205 is a wasteful number, since it uses less digits than its factorization.

20004040205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4960.

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

Adding to 20004040205 its reverse (50204040002), we get a palindrome (70208080207).

The spelling of 20004040205 in words is "twenty billion, four million, forty thousand, two hundred five".