18458068613 has 2 divisors, whose sum is σ = 18458068614. Its totient is φ = 18458068612.

The previous prime is 18458068589. The next prime is 18458068663. The reversal of 18458068613 is 31686085481.

It is an a-pointer prime, because the next prime (18458068663) can be obtained adding 18458068613 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16130778049 + 2327290564 = 127007^2 + 48242^2 .

It is a cyclic number.

It is not a de Polignac number, because 18458068613 - 2⁶ = 18458068549 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18458068663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9229034306 + 9229034307.

It is an arithmetic number, because the mean of its divisors is an integer number (9229034307).

Almost surely, 2^18458068613 is an apocalyptic number.

It is an amenable number.

18458068613 is a deficient number, since it is larger than the sum of its proper divisors (1).

18458068613 is an equidigital number, since it uses as much as digits as its factorization.

18458068613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1105920, while the sum is 50.

The spelling of 18458068613 in words is "eighteen billion, four hundred fifty-eight million, sixty-eight thousand, six hundred thirteen".