18316920468 has 72 divisors (see below), whose sum is σ = 53689295296. Its totient is φ = 4757639040.

The previous prime is 18316920449. The next prime is 18316920497. The reversal of 18316920468 is 86402961381.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 890905 + ... + 911232.

Almost surely, 2^18316920468 is an apocalyptic number.

It is an amenable number.

18316920468 is an abundant number, since it is smaller than the sum of its proper divisors (35372374828).

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

18316920468 is a wasteful number, since it uses less digits than its factorization.

18316920468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1802173 (or 1802160 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The spelling of 18316920468 in words is "eighteen billion, three hundred sixteen million, nine hundred twenty thousand, four hundred sixty-eight".