20326856 has 32 divisors (see below), whose sum is σ = 42007680. Its totient is φ = 9144000.

The previous prime is 20326841. The next prime is 20326879. The reversal of 20326856 is 65862302.

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 7 ways as a sum of consecutive naturals, for example, 7745 + ... + 10031.

It is an arithmetic number, because the mean of its divisors is an integer number (1312740).

Almost surely, 2^20326856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20326856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21003840).

20326856 is an abundant number, since it is smaller than the sum of its proper divisors (21680824).

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

20326856 is a wasteful number, since it uses less digits than its factorization.

20326856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2405 (or 2401 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 20326856 is about 4508.5314682278. The cubic root of 20326856 is about 272.9124847510.

It can be divided in two parts, 2032 and 6856, that added together give a palindrome (8888).

The spelling of 20326856 in words is "twenty million, three hundred twenty-six thousand, eight hundred fifty-six".