18843995000 has 40 divisors (see below), whose sum is σ = 44151492000. Its totient is φ = 7537596000.

The previous prime is 18843994993. The next prime is 18843995039. The reversal of 18843995000 is 59934881.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×18843995000² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1879400 + ... + 1889399.

It is an arithmetic number, because the mean of its divisors is an integer number (1103787300).

Almost surely, 2^18843995000 is an apocalyptic number.

18843995000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18843995000 is an abundant number, since it is smaller than the sum of its proper divisors (25307497000).

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

18843995000 is an equidigital number, since it uses as much as digits as its factorization.

18843995000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3768825 (or 3768806 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The spelling of 18843995000 in words is "eighteen billion, eight hundred forty-three million, nine hundred ninety-five thousand".