20415116 has 6 divisors (see below), whose sum is σ = 35726460. Its totient is φ = 10207556.

The previous prime is 20415103. The next prime is 20415119. The reversal of 20415116 is 61151402.

It is a super-2 number, since 2×20415116² = 833553922586912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20415119) by changing a digit.

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 as a sum of consecutive naturals, namely, 2551886 + ... + 2551893.

It is an arithmetic number, because the mean of its divisors is an integer number (5954410).

Almost surely, 2^20415116 is an apocalyptic number.

It is an amenable number.

20415116 is a deficient number, since it is larger than the sum of its proper divisors (15311344).

20415116 is a wasteful number, since it uses less digits than its factorization.

20415116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5103783 (or 5103781 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 20415116 is about 4518.3089757120. The cubic root of 20415116 is about 273.3069133033.

Adding to 20415116 its reverse (61151402), we get a palindrome (81566518).

The spelling of 20415116 in words is "twenty million, four hundred fifteen thousand, one hundred sixteen".