18002689320 has 128 divisors (see below), whose sum is σ = 67334768640. Its totient is φ = 3740816640.

The previous prime is 18002689307. The next prime is 18002689337. The reversal of 18002689320 is 2398620081.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 964932 + ... + 983411.

It is an arithmetic number, because the mean of its divisors is an integer number (526052880).

Almost surely, 2^18002689320 is an apocalyptic number.

18002689320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18002689320 is an abundant number, since it is smaller than the sum of its proper divisors (49332079320).

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

18002689320 is a wasteful number, since it uses less digits than its factorization.

18002689320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948375 (or 1948371 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The spelling of 18002689320 in words is "eighteen billion, two million, six hundred eighty-nine thousand, three hundred twenty".