18532738225 has 27 divisors (see below), whose sum is σ = 24270695553. Its totient is φ = 14036063040.

The previous prime is 18532738177. The next prime is 18532738243. The reversal of 18532738225 is 52283723581.

The square root of 18532738225 is 136135.

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 863948449 + 17668789776 = 29393^2 + 132924^2 .

It is not a de Polignac number, because 18532738225 - 2¹⁷ = 18532607153 is a prime.

It is a super-2 number, since 2×18532738225² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 12932109 + ... + 12933541.

Almost surely, 2^18532738225 is an apocalyptic number.

18532738225 is the 136135-th square number.

18532738225 is the 68068-th centered octagonal number.

It is an amenable number.

18532738225 is a deficient number, since it is larger than the sum of its proper divisors (5737957328).

18532738225 is an frugal number, since it uses more digits than its factorization.

18532738225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2914 (or 1457 counting only the distinct ones).

The product of its digits is 806400, while the sum is 46.

The spelling of 18532738225 in words is "eighteen billion, five hundred thirty-two million, seven hundred thirty-eight thousand, two hundred twenty-five".