18986128943480 has 64 divisors (see below), whose sum is σ = 43260683904000. Its totient is φ = 7498120017024.

The previous prime is 18986128943473. The next prime is 18986128943539. The reversal of 18986128943480 is 8434982168981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191847851 + ... + 191946789.

It is an arithmetic number, because the mean of its divisors is an integer number (675948186000).

Almost surely, 2^{18986128943480} is an apocalyptic number.

18986128943480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18986128943480 is an abundant number, since it is smaller than the sum of its proper divisors (24274554960520).

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

18986128943480 is a wasteful number, since it uses less digits than its factorization.

18986128943480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159756 (or 159752 counting only the distinct ones).

The product of its (nonzero) digits is 191102976, while the sum is 71.

The spelling of 18986128943480 in words is "eighteen trillion, nine hundred eighty-six billion, one hundred twenty-eight million, nine hundred forty-three thousand, four hundred eighty".