18408796713 has 6 divisors (see below), whose sum is σ = 26590484154. Its totient is φ = 12272531136.

The previous prime is 18408796709. The next prime is 18408796729. The reversal of 18408796713 is 31769780481.

It can be written as a sum of positive squares in only one way, i.e., 12385018944 + 6023777769 = 111288^2 + 77613^2 .

It is not a de Polignac number, because 18408796713 - 2² = 18408796709 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18408796713.

It is not an unprimeable number, because it can be changed into a prime (18408796013) 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, 1022710920 + ... + 1022710937.

It is an arithmetic number, because the mean of its divisors is an integer number (4431747359).

Almost surely, 2^18408796713 is an apocalyptic number.

It is an amenable number.

18408796713 is a deficient number, since it is larger than the sum of its proper divisors (8181687441).

18408796713 is a wasteful number, since it uses less digits than its factorization.

18408796713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045421863 (or 2045421860 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The spelling of 18408796713 in words is "eighteen billion, four hundred eight million, seven hundred ninety-six thousand, seven hundred thirteen".