18933509088 has 144 divisors (see below), whose sum is σ = 58718761920. Its totient is φ = 5751862272.

The previous prime is 18933509087. The next prime is 18933509099. The reversal of 18933509088 is 88090533981.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18933509087) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 263770 + ... + 327782.

It is an arithmetic number, because the mean of its divisors is an integer number (407769180).

Almost surely, 2^18933509088 is an apocalyptic number.

18933509088 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18933509088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29359380960).

18933509088 is an abundant number, since it is smaller than the sum of its proper divisors (39785252832).

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

18933509088 is a wasteful number, since it uses less digits than its factorization.

18933509088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64121 (or 64110 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 18933509088 in words is "eighteen billion, nine hundred thirty-three million, five hundred nine thousand, eighty-eight".