20416356 has 18 divisors (see below), whose sum is σ = 51608102. Its totient is φ = 6805440.

The previous prime is 20416343. The next prime is 20416367. The reversal of 20416356 is 65361402.

20416356 is a `hidden beast` number, since 20 + 4 + 1 + 635 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19448100 + 968256 = 4410^2 + 984^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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, 283525 + ... + 283596.

Almost surely, 2^20416356 is an apocalyptic number.

It is an amenable number.

20416356 is an abundant number, since it is smaller than the sum of its proper divisors (31191746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20416356 is a wasteful number, since it uses less digits than its factorization.

20416356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567131 (or 567126 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20416356 is about 4518.4461931067. The cubic root of 20416356 is about 273.3124466821.

Adding to 20416356 its reverse (65361402), we get a palindrome (85777758).

The spelling of 20416356 in words is "twenty million, four hundred sixteen thousand, three hundred fifty-six".