18421011128 has 32 divisors (see below), whose sum is σ = 37203393360. Its totient is φ = 8500377600.

The previous prime is 18421011071. The next prime is 18421011137. The reversal of 18421011128 is 82111012481.

It is a self number, because there is not a number n which added to its sum of digits gives 18421011128.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 657176 + ... + 684632.

Almost surely, 2^18421011128 is an apocalyptic number.

It is an amenable number.

18421011128 is an abundant number, since it is smaller than the sum of its proper divisors (18782382232).

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

18421011128 is a wasteful number, since it uses less digits than its factorization.

18421011128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33927 (or 33923 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 29.

The spelling of 18421011128 in words is "eighteen billion, four hundred twenty-one million, eleven thousand, one hundred twenty-eight".