15820800013 has 2 divisors, whose sum is σ = 15820800014. Its totient is φ = 15820800012.

The previous prime is 15820799959. The next prime is 15820800029. The reversal of 15820800013 is 31000802851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15555826729 + 264973284 = 124723^2 + 16278^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15820800013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15820800713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7910400006 + 7910400007.

It is an arithmetic number, because the mean of its divisors is an integer number (7910400007).

Almost surely, 2^15820800013 is an apocalyptic number.

It is an amenable number.

15820800013 is a deficient number, since it is larger than the sum of its proper divisors (1).

15820800013 is an equidigital number, since it uses as much as digits as its factorization.

15820800013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 28.

The spelling of 15820800013 in words is "fifteen billion, eight hundred twenty million, eight hundred thousand, thirteen".