18510963025 has 9 divisors (see below), whose sum is σ = 22954437723. Its totient is φ = 14808226200.

The previous prime is 18510963013. The next prime is 18510963049. The reversal of 18510963025 is 52036901581.

The square root of 18510963025 is 136055.

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

It can be written as a sum of positive squares in only one way, i.e., 6663946689 + 11847016336 = 81633^2 + 108844^2 .

It is not a de Polignac number, because 18510963025 - 2¹¹ = 18510960977 is a prime.

It is a super-2 number, since 2×18510963025² (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 (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 666670 + ... + 693880.

Almost surely, 2^18510963025 is an apocalyptic number.

18510963025 is the 136055-th square number.

18510963025 is the 68028-th centered octagonal number.

It is an amenable number.

18510963025 is a deficient number, since it is larger than the sum of its proper divisors (4443474698).

18510963025 is an frugal number, since it uses more digits than its factorization.

18510963025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54432 (or 27216 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 18510963025 in words is "eighteen billion, five hundred ten million, nine hundred sixty-three thousand, twenty-five".