13017821679 has 6 divisors (see below), whose sum is σ = 18803520216. Its totient is φ = 8678547780.

The previous prime is 13017821657. The next prime is 13017821699. The reversal of 13017821679 is 97612871031.

It is not a de Polignac number, because 13017821679 - 2⁸ = 13017821423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13017821639) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 723212307 + ... + 723212324.

It is an arithmetic number, because the mean of its divisors is an integer number (3133920036).

Almost surely, 2^13017821679 is an apocalyptic number.

13017821679 is a deficient number, since it is larger than the sum of its proper divisors (5785698537).

13017821679 is a wasteful number, since it uses less digits than its factorization.

13017821679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446424637 (or 1446424634 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The spelling of 13017821679 in words is "thirteen billion, seventeen million, eight hundred twenty-one thousand, six hundred seventy-nine".