18047187128355 has 96 divisors (see below), whose sum is σ = 36985955201280. Its totient is φ = 7430034689280.

The previous prime is 18047187128303. The next prime is 18047187128371. The reversal of 18047187128355 is 55382178174081.

It is not a de Polignac number, because 18047187128355 - 2⁶ = 18047187128291 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9565660 + ... + 11295849.

It is an arithmetic number, because the mean of its divisors is an integer number (385270366680).

Almost surely, 2^{18047187128355} is an apocalyptic number.

18047187128355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18047187128355 is an abundant number, since it is smaller than the sum of its proper divisors (18938768072925).

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

18047187128355 is a wasteful number, since it uses less digits than its factorization.

18047187128355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20861649 (or 20861642 counting only the distinct ones).

The product of its (nonzero) digits is 15052800, while the sum is 60.

The spelling of 18047187128355 in words is "eighteen trillion, forty-seven billion, one hundred eighty-seven million, one hundred twenty-eight thousand, three hundred fifty-five".