18251649241 has 16 divisors (see below), whose sum is σ = 21770035200. Its totient is φ = 14961271248.

The previous prime is 18251649239. The next prime is 18251649263. The reversal of 18251649241 is 14294615281.

It is not a de Polignac number, because 18251649241 - 2¹ = 18251649239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18251649281) 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 15 ways as a sum of consecutive naturals, for example, 1630020 + ... + 1641178.

It is an arithmetic number, because the mean of its divisors is an integer number (1360627200).

Almost surely, 2^18251649241 is an apocalyptic number.

It is an amenable number.

18251649241 is a deficient number, since it is larger than the sum of its proper divisors (3518385959).

18251649241 is a wasteful number, since it uses less digits than its factorization.

18251649241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21348.

The product of its digits is 138240, while the sum is 43.

The spelling of 18251649241 in words is "eighteen billion, two hundred fifty-one million, six hundred forty-nine thousand, two hundred forty-one".