20856554414 has 32 divisors (see below), whose sum is σ = 33612498720. Its totient is φ = 9671452672.

The previous prime is 20856554413. The next prime is 20856554437. The reversal of 20856554414 is 41445565802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20856554413) 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 15 ways as a sum of consecutive naturals, for example, 648977 + ... + 680355.

It is an arithmetic number, because the mean of its divisors is an integer number (1050390585).

Almost surely, 2^20856554414 is an apocalyptic number.

20856554414 is a deficient number, since it is larger than the sum of its proper divisors (12755944306).

20856554414 is a wasteful number, since it uses less digits than its factorization.

20856554414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31684.

The product of its (nonzero) digits is 768000, while the sum is 44.

The spelling of 20856554414 in words is "twenty billion, eight hundred fifty-six million, five hundred fifty-four thousand, four hundred fourteen".