18889323453 has 144 divisors (see below), whose sum is σ = 38087352576. Its totient is φ = 8863706880.

The previous prime is 18889323451. The next prime is 18889323503. The reversal of 18889323453 is 35432398881.

18889323453 is a `hidden beast` number, since 1 + 8 + 88 + 93 + 23 + 453 = 666.

It is not a de Polignac number, because 18889323453 - 2¹ = 18889323451 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18889323453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18889323451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2960775 + ... + 2967147.

It is an arithmetic number, because the mean of its divisors is an integer number (264495504).

Almost surely, 2^18889323453 is an apocalyptic number.

18889323453 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18889323453 is an abundant number, since it is smaller than the sum of its proper divisors (19198029123).

18889323453 is a wasteful number, since it uses less digits than its factorization.

18889323453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6464 (or 6454 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The spelling of 18889323453 in words is "eighteen billion, eight hundred eighty-nine million, three hundred twenty-three thousand, four hundred fifty-three".