18497660347 has 2 divisors, whose sum is σ = 18497660348. Its totient is φ = 18497660346.

The previous prime is 18497660309. The next prime is 18497660359. The reversal of 18497660347 is 74306679481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18497660347 - 2⁷ = 18497660219 is a prime.

It is not a weakly prime, because it can be changed into another prime (18497660147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9248830173 + 9248830174.

It is an arithmetic number, because the mean of its divisors is an integer number (9248830174).

Almost surely, 2^18497660347 is an apocalyptic number.

18497660347 is a deficient number, since it is larger than the sum of its proper divisors (1).

18497660347 is an equidigital number, since it uses as much as digits as its factorization.

18497660347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6096384, while the sum is 55.

The spelling of 18497660347 in words is "eighteen billion, four hundred ninety-seven million, six hundred sixty thousand, three hundred forty-seven".