18313534279 has 2 divisors, whose sum is σ = 18313534280. Its totient is φ = 18313534278.

The previous prime is 18313534271. The next prime is 18313534297. The reversal of 18313534279 is 97243531381.

Together with next prime (18313534297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18313534279 - 2³ = 18313534271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18313534271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9156767139 + 9156767140.

It is an arithmetic number, because the mean of its divisors is an integer number (9156767140).

Almost surely, 2^18313534279 is an apocalyptic number.

18313534279 is a deficient number, since it is larger than the sum of its proper divisors (1).

18313534279 is an equidigital number, since it uses as much as digits as its factorization.

18313534279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 46.

The spelling of 18313534279 in words is "eighteen billion, three hundred thirteen million, five hundred thirty-four thousand, two hundred seventy-nine".