18507055104 has 90 divisors (see below), whose sum is σ = 53463620210. Its totient is φ = 6168969216.

The previous prime is 18507055033. The next prime is 18507055109. The reversal of 18507055104 is 40155070581.

It can be written as a sum of positive squares in only one way, i.e., 18374344704 + 132710400 = 135552^2 + 11520^2 .

It is a super-2 number, since 2×18507055104² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18507055109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84702 + ... + 210210.

Almost surely, 2^18507055104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18507055104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26731810105).

18507055104 is an abundant number, since it is smaller than the sum of its proper divisors (34956565106).

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

18507055104 is an equidigital number, since it uses as much as digits as its factorization.

18507055104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125543 (or 125514 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 36.

The spelling of 18507055104 in words is "eighteen billion, five hundred seven million, fifty-five thousand, one hundred four".