18104107447 has 4 divisors (see below), whose sum is σ = 18132799216. Its totient is φ = 18075415680.

The previous prime is 18104107423. The next prime is 18104107471. The reversal of 18104107447 is 74470140181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74470140181 = 4801 ⋅15511381.

It is an interprime number because it is at equal distance from previous prime (18104107423) and next prime (18104107471).

It is a cyclic number.

It is not a de Polignac number, because 18104107447 - 2¹¹ = 18104105399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18104105447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14344938 + ... + 14346199.

It is an arithmetic number, because the mean of its divisors is an integer number (4533199804).

Almost surely, 2^18104107447 is an apocalyptic number.

18104107447 is a deficient number, since it is larger than the sum of its proper divisors (28691769).

18104107447 is an equidigital number, since it uses as much as digits as its factorization.

18104107447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28691768.

The product of its (nonzero) digits is 25088, while the sum is 37.

The spelling of 18104107447 in words is "eighteen billion, one hundred four million, one hundred seven thousand, four hundred forty-seven".