18539096521 has 8 divisors (see below), whose sum is σ = 20237544000. Its totient is φ = 16842828240.

The previous prime is 18539096519. The next prime is 18539096549. The reversal of 18539096521 is 12569093581.

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

It is a cyclic number.

It is not a de Polignac number, because 18539096521 - 2¹ = 18539096519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18539096621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 526981 + ... + 561058.

It is an arithmetic number, because the mean of its divisors is an integer number (2529693000).

Almost surely, 2^18539096521 is an apocalyptic number.

18539096521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18539096521 is a deficient number, since it is larger than the sum of its proper divisors (1698447479).

18539096521 is a wasteful number, since it uses less digits than its factorization.

18539096521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089599.

The product of its (nonzero) digits is 583200, while the sum is 49.

The spelling of 18539096521 in words is "eighteen billion, five hundred thirty-nine million, ninety-six thousand, five hundred twenty-one".