18943185492 has 216 divisors, whose sum is σ = 60757447296. Its totient is φ = 4870800000.

The previous prime is 18943185479. The next prime is 18943185529. The reversal of 18943185492 is 29458134981.

It is a happy number.

18943185492 is a `hidden beast` number, since 1 + 8 + 94 + 3 + 1 + 8 + 549 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3076617 + ... + 3082767.

Almost surely, 2^18943185492 is an apocalyptic number.

18943185492 is a gapful number since it is divisible by the number (12) 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 18943185492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30378723648).

18943185492 is an abundant number, since it is smaller than the sum of its proper divisors (41814261804).

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

18943185492 is a wasteful number, since it uses less digits than its factorization.

18943185492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6291 (or 6275 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The spelling of 18943185492 in words is "eighteen billion, nine hundred forty-three million, one hundred eighty-five thousand, four hundred ninety-two".