18461589268 has 12 divisors (see below), whose sum is σ = 32403652372. Its totient is φ = 9203402880.

The previous prime is 18461589257. The next prime is 18461589281. The reversal of 18461589268 is 86298516481.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3346853904 + 15114735364 = 57852^2 + 122942^2 .

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 6846423 + ... + 6849118.

Almost surely, 2^18461589268 is an apocalyptic number.

It is an amenable number.

18461589268 is a deficient number, since it is larger than the sum of its proper divisors (13942063104).

18461589268 is a wasteful number, since it uses less digits than its factorization.

18461589268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13695882 (or 13695880 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 58.

The spelling of 18461589268 in words is "eighteen billion, four hundred sixty-one million, five hundred eighty-nine thousand, two hundred sixty-eight".