18193839274020 has 48 divisors (see below), whose sum is σ = 50946377888448. Its totient is φ = 4851344956800.

The previous prime is 18193839274003. The next prime is 18193839274043. The reversal of 18193839274020 is 2047293839181.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9947299 + ... + 11633418.

It is an arithmetic number, because the mean of its divisors is an integer number (1061382872676).

Almost surely, 2^{18193839274020} is an apocalyptic number.

18193839274020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18193839274020 is an abundant number, since it is smaller than the sum of its proper divisors (32752538614428).

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

18193839274020 is a wasteful number, since it uses less digits than its factorization.

18193839274020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21594780 (or 21594778 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 57.

The spelling of 18193839274020 in words is "eighteen trillion, one hundred ninety-three billion, eight hundred thirty-nine million, two hundred seventy-four thousand, twenty".