18501835158642 has 128 divisors (see below), whose sum is σ = 43793099255808. Its totient is φ = 5147125401600.

The previous prime is 18501835158629. The next prime is 18501835158643. The reversal of 18501835158642 is 24685153810581.

It is a super-3 number, since 3×18501835158642³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (18501835158643) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 258633483 + ... + 258705009.

It is an arithmetic number, because the mean of its divisors is an integer number (342133587936).

Almost surely, 2^{18501835158642} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18501835158642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21896549627904).

18501835158642 is an abundant number, since it is smaller than the sum of its proper divisors (25291264097166).

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

18501835158642 is a wasteful number, since it uses less digits than its factorization.

18501835158642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77224.

The product of its (nonzero) digits is 9216000, while the sum is 57.

The spelling of 18501835158642 in words is "eighteen trillion, five hundred one billion, eight hundred thirty-five million, one hundred fifty-eight thousand, six hundred forty-two".