18520969115 has 8 divisors (see below), whose sum is σ = 24245632368. Its totient is φ = 13469795680.

The previous prime is 18520969099. The next prime is 18520969139. The reversal of 18520969115 is 51196902581.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18520969115 - 2⁴ = 18520969099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18520969115.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168372392 + ... + 168372501.

It is an arithmetic number, because the mean of its divisors is an integer number (3030704046).

Almost surely, 2^18520969115 is an apocalyptic number.

18520969115 is a deficient number, since it is larger than the sum of its proper divisors (5724663253).

18520969115 is a wasteful number, since it uses less digits than its factorization.

18520969115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336744909.

The product of its (nonzero) digits is 194400, while the sum is 47.

The spelling of 18520969115 in words is "eighteen billion, five hundred twenty million, nine hundred sixty-nine thousand, one hundred fifteen".