18478472385 has 8 divisors (see below), whose sum is σ = 29565555840. Its totient is φ = 9855185264.

The previous prime is 18478472381. The next prime is 18478472393. The reversal of 18478472385 is 58327487481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18478472385 - 2² = 18478472381 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18478472381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 615949065 + ... + 615949094.

It is an arithmetic number, because the mean of its divisors is an integer number (3695694480).

Almost surely, 2^18478472385 is an apocalyptic number.

18478472385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18478472385 is a deficient number, since it is larger than the sum of its proper divisors (11087083455).

18478472385 is a wasteful number, since it uses less digits than its factorization.

18478472385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231898167.

The product of its digits is 12042240, while the sum is 57.

The spelling of 18478472385 in words is "eighteen billion, four hundred seventy-eight million, four hundred seventy-two thousand, three hundred eighty-five".