18195950164 has 24 divisors (see below), whose sum is σ = 37974158208. Its totient is φ = 7459209120.

The previous prime is 18195950159. The next prime is 18195950177. The reversal of 18195950164 is 46105959181.

It is a happy number.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

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 7 ways as a sum of consecutive naturals, for example, 14126647 + ... + 14127934.

It is an arithmetic number, because the mean of its divisors is an integer number (1582256592).

Almost surely, 2^18195950164 is an apocalyptic number.

18195950164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18195950164 is an abundant number, since it is smaller than the sum of its proper divisors (19778208044).

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

18195950164 is a wasteful number, since it uses less digits than its factorization.

18195950164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28254615 (or 28254613 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 49.

The spelling of 18195950164 in words is "eighteen billion, one hundred ninety-five million, nine hundred fifty thousand, one hundred sixty-four".