20800321513 has 8 divisors (see below), whose sum is σ = 20838232800. Its totient is φ = 20762445600.

The previous prime is 20800321499. The next prime is 20800321523. The reversal of 20800321513 is 31512300802.

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

It is a cyclic number.

It is not a de Polignac number, because 20800321513 - 2⁹ = 20800321001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20800321523) 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 7 ways as a sum of consecutive naturals, for example, 1351938 + ... + 1367236.

It is an arithmetic number, because the mean of its divisors is an integer number (2604779100).

Almost surely, 2^20800321513 is an apocalyptic number.

It is an amenable number.

20800321513 is a deficient number, since it is larger than the sum of its proper divisors (37911287).

20800321513 is a wasteful number, since it uses less digits than its factorization.

20800321513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17687.

The product of its (nonzero) digits is 1440, while the sum is 25.

The spelling of 20800321513 in words is "twenty billion, eight hundred million, three hundred twenty-one thousand, five hundred thirteen".