18520036668352 has 56 divisors (see below), whose sum is σ = 36954468890000. Its totient is φ = 9208744796160.

The previous prime is 18520036668313. The next prime is 18520036668391. The reversal of 18520036668352 is 25386663002581.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18520036668313) and next prime (18520036668391).

It is a junction number, because it is equal to n+sod(n) for n = 18520036668293 and 18520036668302.

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 7 ways as a sum of consecutive naturals, for example, 16317478 + ... + 17415514.

Almost surely, 2^{18520036668352} is an apocalyptic number.

It is an amenable number.

18520036668352 is a deficient number, since it is larger than the sum of its proper divisors (18434432221648).

18520036668352 is a wasteful number, since it uses less digits than its factorization.

18520036668352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099509 (or 1099499 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 55.

The spelling of 18520036668352 in words is "eighteen trillion, five hundred twenty billion, thirty-six million, six hundred sixty-eight thousand, three hundred fifty-two".