20800580671 has 12 divisors (see below), whose sum is σ = 22532211720. Its totient is φ = 19193285280.

The previous prime is 20800580659. The next prime is 20800580683. The reversal of 20800580671 is 17608500802.

It is an interprime number because it is at equal distance from previous prime (20800580659) and next prime (20800580683).

It is not a de Polignac number, because 20800580671 - 2⁹ = 20800580159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20800580671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20800580611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 454581 + ... + 498241.

It is an arithmetic number, because the mean of its divisors is an integer number (1877684310).

Almost surely, 2^20800580671 is an apocalyptic number.

20800580671 is a deficient number, since it is larger than the sum of its proper divisors (1731631049).

20800580671 is a wasteful number, since it uses less digits than its factorization.

20800580671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46506 (or 46493 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The spelling of 20800580671 in words is "twenty billion, eight hundred million, five hundred eighty thousand, six hundred seventy-one".