17979260213 has 2 divisors, whose sum is σ = 17979260214. Its totient is φ = 17979260212.

The previous prime is 17979260209. The next prime is 17979260381. The reversal of 17979260213 is 31206297971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9709540369 + 8269719844 = 98537^2 + 90938^2 .

It is a cyclic number.

It is not a de Polignac number, because 17979260213 - 2² = 17979260209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17979260513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8989630106 + 8989630107.

It is an arithmetic number, because the mean of its divisors is an integer number (8989630107).

Almost surely, 2^17979260213 is an apocalyptic number.

It is an amenable number.

17979260213 is a deficient number, since it is larger than the sum of its proper divisors (1).

17979260213 is an equidigital number, since it uses as much as digits as its factorization.

17979260213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768, while the sum is 47.

The spelling of 17979260213 in words is "seventeen billion, nine hundred seventy-nine million, two hundred sixty thousand, two hundred thirteen".