18381838292 has 12 divisors (see below), whose sum is σ = 32608878036. Its totient is φ = 9065016000.

The previous prime is 18381838289. The next prime is 18381838357. The reversal of 18381838292 is 29283818381.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13531272976 + 4850565316 = 116324^2 + 69646^2 .

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, 31475459 + ... + 31476042.

It is an arithmetic number, because the mean of its divisors is an integer number (2717406503).

Almost surely, 2^18381838292 is an apocalyptic number.

It is an amenable number.

18381838292 is a deficient number, since it is larger than the sum of its proper divisors (14227039744).

18381838292 is a wasteful number, since it uses less digits than its factorization.

18381838292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62951578 (or 62951576 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 53.

The spelling of 18381838292 in words is "eighteen billion, three hundred eighty-one million, eight hundred thirty-eight thousand, two hundred ninety-two".