18245795947 has 2 divisors, whose sum is σ = 18245795948. Its totient is φ = 18245795946.

The previous prime is 18245795863. The next prime is 18245795963. The reversal of 18245795947 is 74959754281.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18245795947 is a prime.

It is not a weakly prime, because it can be changed into another prime (18245735947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9122897973 + 9122897974.

It is an arithmetic number, because the mean of its divisors is an integer number (9122897974).

Almost surely, 2^18245795947 is an apocalyptic number.

18245795947 is a deficient number, since it is larger than the sum of its proper divisors (1).

18245795947 is an equidigital number, since it uses as much as digits as its factorization.

18245795947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25401600, while the sum is 61.

The spelling of 18245795947 in words is "eighteen billion, two hundred forty-five million, seven hundred ninety-five thousand, nine hundred forty-seven".