20504113 has 16 divisors (see below), whose sum is σ = 24601600. Its totient is φ = 16718400.

The previous prime is 20504101. The next prime is 20504117. The reversal of 20504113 is 31140502.

It is a cyclic number.

It is not a de Polignac number, because 20504113 - 2⁹ = 20503601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20504117) 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, 12463 + ... + 14011.

It is an arithmetic number, because the mean of its divisors is an integer number (1537600).

Almost surely, 2^20504113 is an apocalyptic number.

It is an amenable number.

20504113 is a deficient number, since it is larger than the sum of its proper divisors (4097487).

20504113 is a wasteful number, since it uses less digits than its factorization.

20504113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 20504113 is about 4528.1467511555. The cubic root of 20504113 is about 273.7034860470.

Adding to 20504113 its reverse (31140502), we get a palindrome (51644615).

The spelling of 20504113 in words is "twenty million, five hundred four thousand, one hundred thirteen".