18351851849992 has 64 divisors (see below), whose sum is σ = 34881832062000. Its totient is φ = 9050850729984.

The previous prime is 18351851849959. The next prime is 18351851850001. The reversal of 18351851849992 is 29994815815381.

It can be written as a sum of positive squares in 8 ways, for example, as 9561540046276 + 8790311803716 = 3092174^2 + 2964846^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 477980748 + ... + 478019140.

Almost surely, 2^{18351851849992} is an apocalyptic number.

It is an amenable number.

18351851849992 is a deficient number, since it is larger than the sum of its proper divisors (16529980212008).

18351851849992 is a wasteful number, since it uses less digits than its factorization.

18351851849992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41050 (or 41046 counting only the distinct ones).

The product of its digits is 223948800, while the sum is 73.

The spelling of 18351851849992 in words is "eighteen trillion, three hundred fifty-one billion, eight hundred fifty-one million, eight hundred forty-nine thousand, nine hundred ninety-two".