18891260496 has 120 divisors (see below), whose sum is σ = 56659349760. Its totient is φ = 5860470528.

The previous prime is 18891260471. The next prime is 18891260501. The reversal of 18891260496 is 69406219881.

18891260496 is a `hidden beast` number, since 1 + 8 + 8 + 91 + 2 + 60 + 496 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45465 + ... + 199623.

It is an arithmetic number, because the mean of its divisors is an integer number (472161248).

Almost surely, 2^18891260496 is an apocalyptic number.

18891260496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18891260496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28329674880).

18891260496 is an abundant number, since it is smaller than the sum of its proper divisors (37768089264).

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

18891260496 is a wasteful number, since it uses less digits than its factorization.

18891260496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154233 (or 154224 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 18891260496 in words is "eighteen billion, eight hundred ninety-one million, two hundred sixty thousand, four hundred ninety-six".