18471620928 has 56 divisors (see below), whose sum is σ = 48892053600. Its totient is φ = 6154785280.

The previous prime is 18471620911. The next prime is 18471620969. The reversal of 18471620928 is 82902617481.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508723 + ... + 543821.

Almost surely, 2^18471620928 is an apocalyptic number.

It is an amenable number.

18471620928 is an abundant number, since it is smaller than the sum of its proper divisors (30420432672).

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

18471620928 is a wasteful number, since it uses less digits than its factorization.

18471620928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37855 (or 37845 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 48.

The spelling of 18471620928 in words is "eighteen billion, four hundred seventy-one million, six hundred twenty thousand, nine hundred twenty-eight".