18470817247 has 2 divisors, whose sum is σ = 18470817248. Its totient is φ = 18470817246.

The previous prime is 18470817179. The next prime is 18470817259. The reversal of 18470817247 is 74271807481.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18470817247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18470817247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18470817047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9235408623 + 9235408624.

It is an arithmetic number, because the mean of its divisors is an integer number (9235408624).

Almost surely, 2^18470817247 is an apocalyptic number.

18470817247 is a deficient number, since it is larger than the sum of its proper divisors (1).

18470817247 is an equidigital number, since it uses as much as digits as its factorization.

18470817247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 702464, while the sum is 49.

The spelling of 18470817247 in words is "eighteen billion, four hundred seventy million, eight hundred seventeen thousand, two hundred forty-seven".