20643816014 has 32 divisors (see below), whose sum is σ = 32566558464. Its totient is φ = 9795582720.

The previous prime is 20643816007. The next prime is 20643816041. The reversal of 20643816014 is 41061834602.

It is a congruent number.

It is an unprimeable number.

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, 5044109 + ... + 5048199.

It is an arithmetic number, because the mean of its divisors is an integer number (1017704952).

Almost surely, 2^20643816014 is an apocalyptic number.

20643816014 is a deficient number, since it is larger than the sum of its proper divisors (11922742450).

20643816014 is a wasteful number, since it uses less digits than its factorization.

20643816014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4952.

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 20643816014 in words is "twenty billion, six hundred forty-three million, eight hundred sixteen thousand, fourteen".