18213500010 has 64 divisors (see below), whose sum is σ = 44484888960. Its totient is φ = 4771219200.

The previous prime is 18213499937. The next prime is 18213500057. The reversal of 18213500010 is 1000531281.

It is a super-2 number, since 2×18213500010² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18213500010.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3362064 + ... + 3367476.

It is an arithmetic number, because the mean of its divisors is an integer number (695076390).

Almost surely, 2^18213500010 is an apocalyptic number.

18213500010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18213500010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22242444480).

18213500010 is an abundant number, since it is smaller than the sum of its proper divisors (26271388950).

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

18213500010 is a wasteful number, since it uses less digits than its factorization.

18213500010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7383.

The product of its (nonzero) digits is 240, while the sum is 21.

The spelling of 18213500010 in words is "eighteen billion, two hundred thirteen million, five hundred thousand, ten".