18289414920 has 128 divisors (see below), whose sum is σ = 64868947200. Its totient is φ = 4036279296.

The previous prime is 18289414901. The next prime is 18289414939. The reversal of 18289414920 is 2941498281.

It is an interprime number because it is at equal distance from previous prime (18289414901) and next prime (18289414939).

It is a self number, because there is not a number n which added to its sum of digits gives 18289414920.

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, 351039 + ... + 399758.

It is an arithmetic number, because the mean of its divisors is an integer number (506788650).

Almost surely, 2^18289414920 is an apocalyptic number.

18289414920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18289414920 is an abundant number, since it is smaller than the sum of its proper divisors (46579532280).

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

18289414920 is a wasteful number, since it uses less digits than its factorization.

18289414920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750847 (or 750843 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 48.

The spelling of 18289414920 in words is "eighteen billion, two hundred eighty-nine million, four hundred fourteen thousand, nine hundred twenty".