18455222500 has 405 divisors, whose sum is σ = 50696360253. Its totient is φ = 5868720000.

The previous prime is 18455222411. The next prime is 18455222501. The reversal of 18455222500 is 522255481.

The square root of 18455222500 is 135850.

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 18228780196 + 226442304 = 135014^2 + 15048^2 .

It is not an unprimeable number, because it can be changed into a prime (18455222501) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 971327491 + ... + 971327509.

Almost surely, 2^18455222500 is an apocalyptic number.

18455222500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18455222500 is the 135850-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18455222500

18455222500 is an abundant number, since it is smaller than the sum of its proper divisors (32241137753).

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

18455222500 is a wasteful number, since it uses less digits than its factorization.

18455222500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 34.

Adding to 18455222500 its reverse (522255481), we get a palindrome (18977477981).

The spelling of 18455222500 in words is "eighteen billion, four hundred fifty-five million, two hundred twenty-two thousand, five hundred".