18555409348100 has 72 divisors (see below), whose sum is σ = 40821793571328. Its totient is φ = 7319597702400.

The previous prime is 18555409348081. The next prime is 18555409348123. The reversal of 18555409348100 is 184390455581.

It is a super-2 number, since 2×18555409348100² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61395557 + ... + 61697043.

Almost surely, 2^{18555409348100} is an apocalyptic number.

18555409348100 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 18555409348100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20410896785664).

18555409348100 is an abundant number, since it is smaller than the sum of its proper divisors (22266384223228).

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

18555409348100 is a wasteful number, since it uses less digits than its factorization.

18555409348100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310005 (or 309998 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 53.

The spelling of 18555409348100 in words is "eighteen trillion, five hundred fifty-five billion, four hundred nine million, three hundred forty-eight thousand, one hundred".