18894864380 has 24 divisors (see below), whose sum is σ = 45347674848. Its totient is φ = 6478239168.

The previous prime is 18894864379. The next prime is 18894864403. The reversal of 18894864380 is 8346849881.

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, 67481519 + ... + 67481798.

It is an arithmetic number, because the mean of its divisors is an integer number (1889486452).

Almost surely, 2^18894864380 is an apocalyptic number.

18894864380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18894864380 is an abundant number, since it is smaller than the sum of its proper divisors (26452810468).

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

18894864380 is a wasteful number, since it uses less digits than its factorization.

18894864380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134963333 (or 134963331 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 59.

The spelling of 18894864380 in words is "eighteen billion, eight hundred ninety-four million, eight hundred sixty-four thousand, three hundred eighty".