18953238108 has 48 divisors (see below), whose sum is σ = 50728530944. Its totient is φ = 5395222080.

The previous prime is 18953238071. The next prime is 18953238121. The reversal of 18953238108 is 80183235981.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 393535 + ... + 439062.

Almost surely, 2^18953238108 is an apocalyptic number.

It is an amenable number.

18953238108 is an abundant number, since it is smaller than the sum of its proper divisors (31775292836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18953238108 is a wasteful number, since it uses less digits than its factorization.

18953238108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832882 (or 832880 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 48.

The spelling of 18953238108 in words is "eighteen billion, nine hundred fifty-three million, two hundred thirty-eight thousand, one hundred eight".