20620886 has 16 divisors (see below), whose sum is σ = 36339408. Its totient is φ = 8652000.

The previous prime is 20620879. The next prime is 20620889. The reversal of 20620886 is 68802602.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20620889) 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 7 ways as a sum of consecutive naturals, for example, 35765 + ... + 36336.

It is an arithmetic number, because the mean of its divisors is an integer number (2271213).

Almost surely, 2^20620886 is an apocalyptic number.

20620886 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20620886 is a deficient number, since it is larger than the sum of its proper divisors (15718522).

20620886 is a wasteful number, since it uses less digits than its factorization.

20620886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72127.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 20620886 is about 4541.0225720646. The cubic root of 20620886 is about 274.2220924745. Note that the first 3 decimals are identical.

The spelling of 20620886 in words is "twenty million, six hundred twenty thousand, eight hundred eighty-six".