18489319480 has 32 divisors (see below), whose sum is σ = 41605196400. Its totient is φ = 7394976256.

The previous prime is 18489319411. The next prime is 18489319481. The reversal of 18489319480 is 8491398481.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18489319481) 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, 544851 + ... + 577789.

Almost surely, 2^18489319480 is an apocalyptic number.

18489319480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18489319480 is an abundant number, since it is smaller than the sum of its proper divisors (23115876920).

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

18489319480 is a wasteful number, since it uses less digits than its factorization.

18489319480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46983 (or 46979 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 55.

The spelling of 18489319480 in words is "eighteen billion, four hundred eighty-nine million, three hundred nineteen thousand, four hundred eighty".