188343007818 has 64 divisors (see below), whose sum is σ = 441252790272. Its totient is φ = 52469493120.

The previous prime is 188343007813. The next prime is 188343007829. The reversal of 188343007818 is 818700343881.

It is a super-2 number, since 2×188343007818² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (188343007813) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3039655 + ... + 3100997.

It is an arithmetic number, because the mean of its divisors is an integer number (6894574848).

Almost surely, 2^188343007818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 188343007818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220626395136).

188343007818 is an abundant number, since it is smaller than the sum of its proper divisors (252909782454).

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

188343007818 is a wasteful number, since it uses less digits than its factorization.

188343007818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63179.

The product of its (nonzero) digits is 1032192, while the sum is 51.

The spelling of 188343007818 in words is "one hundred eighty-eight billion, three hundred forty-three million, seven thousand, eight hundred eighteen".