18477054047 has 4 divisors (see below), whose sum is σ = 18699669240. Its totient is φ = 18254438856.

The previous prime is 18477054041. The next prime is 18477054049. The reversal of 18477054047 is 74045077481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18477054047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18477053992 and 18477054010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18477054041) 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, 111307472 + ... + 111307637.

It is an arithmetic number, because the mean of its divisors is an integer number (4674917310).

Almost surely, 2^18477054047 is an apocalyptic number.

18477054047 is a deficient number, since it is larger than the sum of its proper divisors (222615193).

18477054047 is an equidigital number, since it uses as much as digits as its factorization.

18477054047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222615192.

The product of its (nonzero) digits is 878080, while the sum is 47.

The spelling of 18477054047 in words is "eighteen billion, four hundred seventy-seven million, fifty-four thousand, forty-seven".