18130622500 has 45 divisors (see below), whose sum is σ = 39662773381. Its totient is φ = 7249556000.

The previous prime is 18130622479. The next prime is 18130622507. The reversal of 18130622500 is 522603181.

The square root of 18130622500 is 134650.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 15231015396 + 2899607104 = 123414^2 + 53848^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18130622507) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 6731154 + ... + 6733846.

Almost surely, 2^18130622500 is an apocalyptic number.

18130622500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18130622500 is the 134650-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18130622500

18130622500 is an abundant number, since it is smaller than the sum of its proper divisors (21532150881).

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

18130622500 is an frugal number, since it uses more digits than its factorization.

18130622500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5410 (or 2700 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 18130622500 in words is "eighteen billion, one hundred thirty million, six hundred twenty-two thousand, five hundred".