20856030826 has 8 divisors (see below), whose sum is σ = 31394591424. Its totient is φ = 10391167020.

The previous prime is 20856030821. The next prime is 20856030841. The reversal of 20856030826 is 62803065802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20856030821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18423490 + ... + 18424621.

It is an arithmetic number, because the mean of its divisors is an integer number (3924323928).

Almost surely, 2^20856030826 is an apocalyptic number.

20856030826 is a deficient number, since it is larger than the sum of its proper divisors (10538560598).

20856030826 is a wasteful number, since it uses less digits than its factorization.

20856030826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36848396.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 20856030826 in words is "twenty billion, eight hundred fifty-six million, thirty thousand, eight hundred twenty-six".