18894144588 has 24 divisors (see below), whose sum is σ = 48094186560. Its totient is φ = 5725498320.

The previous prime is 18894144587. The next prime is 18894144589. The reversal of 18894144588 is 88544149881.

It is an interprime number because it is at equal distance from previous prime (18894144587) and next prime (18894144589).

It is not an unprimeable number, because it can be changed into a prime (18894144587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71568598 + ... + 71568861.

It is an arithmetic number, because the mean of its divisors is an integer number (2003924440).

Almost surely, 2^18894144588 is an apocalyptic number.

It is an amenable number.

18894144588 is an abundant number, since it is smaller than the sum of its proper divisors (29200041972).

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

18894144588 is a wasteful number, since it uses less digits than its factorization.

18894144588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143137477 (or 143137475 counting only the distinct ones).

The product of its digits is 11796480, while the sum is 60.

The spelling of 18894144588 in words is "eighteen billion, eight hundred ninety-four million, one hundred forty-four thousand, five hundred eighty-eight".