18931449480 has 64 divisors (see below), whose sum is σ = 57865959360. Its totient is φ = 4953132288.

The previous prime is 18931449457. The next prime is 18931449521. The reversal of 18931449480 is 8494413981.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1481962 + ... + 1494681.

It is an arithmetic number, because the mean of its divisors is an integer number (904155615).

Almost surely, 2^18931449480 is an apocalyptic number.

18931449480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18931449480 is an abundant number, since it is smaller than the sum of its proper divisors (38934509880).

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

18931449480 is a wasteful number, since it uses less digits than its factorization.

18931449480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2976710 (or 2976706 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 51.

The spelling of 18931449480 in words is "eighteen billion, nine hundred thirty-one million, four hundred forty-nine thousand, four hundred eighty".