18535168685040 has 320 divisors, whose sum is σ = 67941447183360. Its totient is φ = 4089942097920.

The previous prime is 18535168685023. The next prime is 18535168685063. The reversal of 18535168685040 is 4058686153581.

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 408591960 + ... + 408637320.

It is an arithmetic number, because the mean of its divisors is an integer number (212317022448).

Almost surely, 2^{18535168685040} is an apocalyptic number.

18535168685040 is a gapful number since it is divisible by the number (10) 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 18535168685040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33970723591680).

18535168685040 is an abundant number, since it is smaller than the sum of its proper divisors (49406278498320).

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

18535168685040 is a wasteful number, since it uses less digits than its factorization.

18535168685040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53800 (or 53794 counting only the distinct ones).

The product of its (nonzero) digits is 27648000, while the sum is 60.

The spelling of 18535168685040 in words is "eighteen trillion, five hundred thirty-five billion, one hundred sixty-eight million, six hundred eighty-five thousand, forty".