18873478474 has 8 divisors (see below), whose sum is σ = 28386117540. Its totient is φ = 9411439296.

The previous prime is 18873478469. The next prime is 18873478493. The reversal of 18873478474 is 47487437881.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18389258449 + 484220025 = 135607^2 + 22005^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12649039 + ... + 12650530.

Almost surely, 2^18873478474 is an apocalyptic number.

18873478474 is a deficient number, since it is larger than the sum of its proper divisors (9512639066).

18873478474 is a wasteful number, since it uses less digits than its factorization.

18873478474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25299944.

The product of its digits is 33718272, while the sum is 61.

The spelling of 18873478474 in words is "eighteen billion, eight hundred seventy-three million, four hundred seventy-eight thousand, four hundred seventy-four".