18496635725 has 18 divisors (see below), whose sum is σ = 23731417290. Its totient is φ = 14284228000.

The previous prime is 18496635721. The next prime is 18496635733. The reversal of 18496635725 is 52753669481.

It can be written as a sum of positive squares in 3 ways, for example, as 1250117449 + 17246518276 = 35357^2 + 131326^2 .

It is not a de Polignac number, because 18496635725 - 2² = 18496635721 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18496635721) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 3659450 + ... + 3664500.

Almost surely, 2^18496635725 is an apocalyptic number.

It is an amenable number.

18496635725 is a deficient number, since it is larger than the sum of its proper divisors (5234781565).

18496635725 is an frugal number, since it uses more digits than its factorization.

18496635725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10141 (or 5085 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 56.

The spelling of 18496635725 in words is "eighteen billion, four hundred ninety-six million, six hundred thirty-five thousand, seven hundred twenty-five".