20616113 has 6 divisors (see below), whose sum is σ = 23982066. Its totient is φ = 17670912.

The previous prime is 20616107. The next prime is 20616133. The reversal of 20616113 is 31161602.

It can be written as a sum of positive squares in only one way, i.e., 17698849 + 2917264 = 4207^2 + 1708^2 .

It is not a de Polignac number, because 20616113 - 2¹⁴ = 20599729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20616133) 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 5 ways as a sum of consecutive naturals, for example, 210320 + ... + 210417.

It is an arithmetic number, because the mean of its divisors is an integer number (3997011).

Almost surely, 2^20616113 is an apocalyptic number.

It is an amenable number.

20616113 is a deficient number, since it is larger than the sum of its proper divisors (3365953).

20616113 is an equidigital number, since it uses as much as digits as its factorization.

20616113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420751 (or 420744 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 20616113 is about 4540.4969992282. The cubic root of 20616113 is about 274.2009332956.

Adding to 20616113 its reverse (31161602), we get a palindrome (51777715).

The spelling of 20616113 in words is "twenty million, six hundred sixteen thousand, one hundred thirteen".