18361669492 has 6 divisors (see below), whose sum is σ = 32132921618. Its totient is φ = 9180834744.

The previous prime is 18361669481. The next prime is 18361669507. The reversal of 18361669492 is 29496616381.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10517733136 + 7843936356 = 102556^2 + 88566^2 .

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 as a sum of consecutive naturals, namely, 2295208683 + ... + 2295208690.

Almost surely, 2^18361669492 is an apocalyptic number.

It is an amenable number.

18361669492 is a deficient number, since it is larger than the sum of its proper divisors (13771252126).

18361669492 is a wasteful number, since it uses less digits than its factorization.

18361669492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4590417377 (or 4590417375 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 55.

The spelling of 18361669492 in words is "eighteen billion, three hundred sixty-one million, six hundred sixty-nine thousand, four hundred ninety-two".