20826786 has 16 divisors (see below), whose sum is σ = 41727168. Its totient is φ = 6930000.

The previous prime is 20826697. The next prime is 20826791. The reversal of 20826786 is 68762802.

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 7 ways as a sum of consecutive naturals, for example, 1036 + ... + 6536.

It is an arithmetic number, because the mean of its divisors is an integer number (2607948).

Almost surely, 2^20826786 is an apocalyptic number.

20826786 is an abundant number, since it is smaller than the sum of its proper divisors (20900382).

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

20826786 is a wasteful number, since it uses less digits than its factorization.

20826786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6137.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 20826786 is about 4563.6373650850. The cubic root of 20826786 is about 275.1317759633.

It can be divided in two parts, 20826 and 786, that added together give a palindrome (21612).

The spelling of 20826786 in words is "twenty million, eight hundred twenty-six thousand, seven hundred eighty-six".