18455509960500 has 384 divisors, whose sum is σ = 58643289169920. Its totient is φ = 4494008563200.

The previous prime is 18455509960493. The next prime is 18455509960523. The reversal of 18455509960500 is 506990555481.

It is a happy number.

It is a super-2 number, since 2×18455509960500² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent 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 127 ways as a sum of consecutive naturals, for example, 112749717 + ... + 112913283.

It is an arithmetic number, because the mean of its divisors is an integer number (152716898880).

Almost surely, 2^{18455509960500} is an apocalyptic number.

18455509960500 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 18455509960500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29321644584960).

18455509960500 is an abundant number, since it is smaller than the sum of its proper divisors (40187779209420).

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

18455509960500 is a wasteful number, since it uses less digits than its factorization.

18455509960500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163752 (or 163740 counting only the distinct ones).

The product of its (nonzero) digits is 9720000, while the sum is 57.

The spelling of 18455509960500 in words is "eighteen trillion, four hundred fifty-five billion, five hundred nine million, nine hundred sixty thousand, five hundred".