18280211814 has 64 divisors (see below), whose sum is σ = 42470553600. Its totient is φ = 5828263848.

The previous prime is 18280211813. The next prime is 18280211827. The reversal of 18280211814 is 41811208281.

It is a super-2 number, since 2×18280211814² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18280211813) 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, 643107 + ... + 670929.

It is an arithmetic number, because the mean of its divisors is an integer number (663602400).

Almost surely, 2^18280211814 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18280211814, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21235276800).

18280211814 is an abundant number, since it is smaller than the sum of its proper divisors (24190341786).

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

18280211814 is an equidigital number, since it uses as much as digits as its factorization.

18280211814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27903 (or 27851 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 36.

The spelling of 18280211814 in words is "eighteen billion, two hundred eighty million, two hundred eleven thousand, eight hundred fourteen".