18225000000 has 441 divisors, whose sum is σ = 67778773891. Its totient is φ = 4860000000.

The previous prime is 18224999983. The next prime is 18225000019. The reversal of 18225000000 is 52281.

The square root of 18225000000 is 135000.

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

It can be written as a sum of positive squares in 4 ways, for example, as 12957724224 + 5267275776 = 113832^2 + 72576^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 3644999998 + ... + 3645000002.

Almost surely, 2^18225000000 is an apocalyptic number.

18225000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18225000000 is the 135000-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18225000000

18225000000 is an abundant number, since it is smaller than the sum of its proper divisors (49553773891).

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

18225000000 is an frugal number, since it uses more digits than its factorization.

18225000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 10 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 18225000000 its reverse (52281), we get a palindrome (18225052281).

The spelling of 18225000000 in words is "eighteen billion, two hundred twenty-five million", and thus it is an aban number.