20204013 has 16 divisors (see below), whose sum is σ = 27499520. Its totient is φ = 13191984.

The previous prime is 20204003. The next prime is 20204017. The reversal of 20204013 is 31040202.

It is not a de Polignac number, because 20204013 - 2⁶ = 20203949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20204013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20204017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38370 + ... + 38892.

It is an arithmetic number, because the mean of its divisors is an integer number (1718720).

Almost surely, 2^20204013 is an apocalyptic number.

It is an amenable number.

20204013 is a deficient number, since it is larger than the sum of its proper divisors (7295507).

20204013 is a wasteful number, since it uses less digits than its factorization.

20204013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 20204013 is about 4494.8874290687. The cubic root of 20204013 is about 272.3616018594.

Adding to 20204013 its reverse (31040202), we get a palindrome (51244215).

The spelling of 20204013 in words is "twenty million, two hundred four thousand, thirteen".