18107431847 has 2 divisors, whose sum is σ = 18107431848. Its totient is φ = 18107431846.

The previous prime is 18107431843. The next prime is 18107431861. The reversal of 18107431847 is 74813470181.

It is a weak prime.

It is an emirp because it is prime and its reverse (74813470181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18107431847 - 2² = 18107431843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18107431798 and 18107431807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18107431841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9053715923 + 9053715924.

It is an arithmetic number, because the mean of its divisors is an integer number (9053715924).

Almost surely, 2^18107431847 is an apocalyptic number.

18107431847 is a deficient number, since it is larger than the sum of its proper divisors (1).

18107431847 is an equidigital number, since it uses as much as digits as its factorization.

18107431847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150528, while the sum is 44.

The spelling of 18107431847 in words is "eighteen billion, one hundred seven million, four hundred thirty-one thousand, eight hundred forty-seven".