18873478425 has 12 divisors (see below), whose sum is σ = 31204151120. Its totient is φ = 10065855120.

The previous prime is 18873478417. The next prime is 18873478453. The reversal of 18873478425 is 52487437881.

It is not a de Polignac number, because 18873478425 - 2³ = 18873478417 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 125823115 + ... + 125823264.

Almost surely, 2^18873478425 is an apocalyptic number.

18873478425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18873478425 is a deficient number, since it is larger than the sum of its proper divisors (12330672695).

18873478425 is a wasteful number, since it uses less digits than its factorization.

18873478425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251646392 (or 251646387 counting only the distinct ones).

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

The spelling of 18873478425 in words is "eighteen billion, eight hundred seventy-three million, four hundred seventy-eight thousand, four hundred twenty-five".