18074631947 has 4 divisors (see below), whose sum is σ = 18074903616. Its totient is φ = 18074360280.

The previous prime is 18074631941. The next prime is 18074631977. The reversal of 18074631947 is 74913647081.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18074631947 - 2¹⁴ = 18074615563 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18074631895 and 18074631904.

It is not an unprimeable number, because it can be changed into a prime (18074631941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38822 + ... + 194052.

It is an arithmetic number, because the mean of its divisors is an integer number (4518725904).

Almost surely, 2^18074631947 is an apocalyptic number.

18074631947 is a deficient number, since it is larger than the sum of its proper divisors (271669).

18074631947 is a wasteful number, since it uses less digits than its factorization.

18074631947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271668.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The spelling of 18074631947 in words is "eighteen billion, seventy-four million, six hundred thirty-one thousand, nine hundred forty-seven".