13217730858 has 12 divisors (see below), whose sum is σ = 28638416898. Its totient is φ = 4405910280.

The previous prime is 13217730857. The next prime is 13217730887. The reversal of 13217730858 is 85803771231.

It can be written as a sum of positive squares in only one way, i.e., 11820690729 + 1397040129 = 108723^2 + 37377^2 .

It is not an unprimeable number, because it can be changed into a prime (13217730857) 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, 367159173 + ... + 367159208.

Almost surely, 2^13217730858 is an apocalyptic number.

13217730858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13217730858 is an abundant number, since it is smaller than the sum of its proper divisors (15420686040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13217730858 is a wasteful number, since it uses less digits than its factorization.

13217730858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734318389 (or 734318386 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 13217730858 in words is "thirteen billion, two hundred seventeen million, seven hundred thirty thousand, eight hundred fifty-eight".