18115814351 has 2 divisors, whose sum is σ = 18115814352. Its totient is φ = 18115814350.

The previous prime is 18115814341. The next prime is 18115814383. The reversal of 18115814351 is 15341851181.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18115814351 - 2¹⁴ = 18115797967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18115814341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9057907175 + 9057907176.

It is an arithmetic number, because the mean of its divisors is an integer number (9057907176).

Almost surely, 2^18115814351 is an apocalyptic number.

18115814351 is a deficient number, since it is larger than the sum of its proper divisors (1).

18115814351 is an equidigital number, since it uses as much as digits as its factorization.

18115814351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19200, while the sum is 38.

The spelling of 18115814351 in words is "eighteen billion, one hundred fifteen million, eight hundred fourteen thousand, three hundred fifty-one".