18123539351 has 2 divisors, whose sum is σ = 18123539352. Its totient is φ = 18123539350.

The previous prime is 18123539323. The next prime is 18123539363. The reversal of 18123539351 is 15393532181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18123539351 - 2²² = 18119345047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18123539299 and 18123539308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18123509351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9061769675 + 9061769676.

It is an arithmetic number, because the mean of its divisors is an integer number (9061769676).

Almost surely, 2^18123539351 is an apocalyptic number.

18123539351 is a deficient number, since it is larger than the sum of its proper divisors (1).

18123539351 is an equidigital number, since it uses as much as digits as its factorization.

18123539351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 41.

The spelling of 18123539351 in words is "eighteen billion, one hundred twenty-three million, five hundred thirty-nine thousand, three hundred fifty-one".