18167914840 has 32 divisors (see below), whose sum is σ = 41570658000. Its totient is φ = 7143992704.

The previous prime is 18167914837. The next prime is 18167914861. The reversal of 18167914840 is 4841976181.

It is a happy number.

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, 3846775 + ... + 3851494.

Almost surely, 2^18167914840 is an apocalyptic number.

18167914840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18167914840 is an abundant number, since it is smaller than the sum of its proper divisors (23402743160).

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

18167914840 is a wasteful number, since it uses less digits than its factorization.

18167914840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7698339 (or 7698335 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 49.

The spelling of 18167914840 in words is "eighteen billion, one hundred sixty-seven million, nine hundred fourteen thousand, eight hundred forty".