18041799218520 has 256 divisors, whose sum is σ = 67966495027200. Its totient is φ = 3721974197760.

The previous prime is 18041799218497. The next prime is 18041799218543. The reversal of 18041799218520 is 2581299714081.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18041799218497) and next prime (18041799218543).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5739294 + ... + 8308013.

It is an arithmetic number, because the mean of its divisors is an integer number (265494121200).

Almost surely, 2^{18041799218520} is an apocalyptic number.

18041799218520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18041799218520 is an abundant number, since it is smaller than the sum of its proper divisors (49924695808680).

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

18041799218520 is a wasteful number, since it uses less digits than its factorization.

18041799218520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14047478 (or 14047474 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 57.

The spelling of 18041799218520 in words is "eighteen trillion, forty-one billion, seven hundred ninety-nine million, two hundred eighteen thousand, five hundred twenty".