20113616 has 20 divisors (see below), whose sum is σ = 39921924. Its totient is φ = 9811200.

The previous prime is 20113589. The next prime is 20113627. The reversal of 20113616 is 61631102.

It can be written as a sum of positive squares in 2 ways, for example, as 11587216 + 8526400 = 3404^2 + 2920^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14675 + ... + 15986.

Almost surely, 2^20113616 is an apocalyptic number.

It is an amenable number.

20113616 is a deficient number, since it is larger than the sum of its proper divisors (19808308).

20113616 is a wasteful number, since it uses less digits than its factorization.

20113616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30710 (or 30704 counting only the distinct ones).

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

The square root of 20113616 is about 4484.8206207161. The cubic root of 20113616 is about 271.9547935251.

Adding to 20113616 its reverse (61631102), we get a palindrome (81744718).

The spelling of 20113616 in words is "twenty million, one hundred thirteen thousand, six hundred sixteen".