18656054420 has 24 divisors (see below), whose sum is σ = 39649738464. Its totient is φ = 7372512416.

The previous prime is 18656054411. The next prime is 18656054447. The reversal of 18656054420 is 2445065681.

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 7 ways as a sum of consecutive naturals, for example, 5617634 + ... + 5620953.

It is an arithmetic number, because the mean of its divisors is an integer number (1652072436).

Almost surely, 2^18656054420 is an apocalyptic number.

18656054420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18656054420 is an abundant number, since it is smaller than the sum of its proper divisors (20993684044).

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

18656054420 is a wasteful number, since it uses less digits than its factorization.

18656054420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11238679 (or 11238677 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 18656054420 in words is "eighteen billion, six hundred fifty-six million, fifty-four thousand, four hundred twenty".