18449301420225 has 81 divisors (see below), whose sum is σ = 35783808117993. Its totient is φ = 9082320661440.

The previous prime is 18449301420191. The next prime is 18449301420247. The reversal of 18449301420225 is 52202410394481.

The square root of 18449301420225 is 4295265.

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

18449301420225 is a `hidden beast` number, since 1 + 84 + 4 + 9 + 301 + 42 + 0 + 225 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4755334732929 + 13693966687296 = 2180673^2 + 3700536^2 .

It is not a de Polignac number, because 18449301420225 - 2¹⁵ = 18449301387457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 837565662 + ... + 837587688.

Almost surely, 2^{18449301420225} is an apocalyptic number.

18449301420225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18449301420225 is the 4295265-th square number.

18449301420225 is the 2147633-rd centered octagonal number.

It is an amenable number.

18449301420225 is a deficient number, since it is larger than the sum of its proper divisors (17334506697768).

18449301420225 is an frugal number, since it uses more digits than its factorization.

18449301420225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44096 (or 22048 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 18449301420225 in words is "eighteen trillion, four hundred forty-nine billion, three hundred one million, four hundred twenty thousand, two hundred twenty-five".