18540558355 has 24 divisors (see below), whose sum is σ = 24975510336. Its totient is φ = 13197127680.

The previous prime is 18540558329. The next prime is 18540558383. The reversal of 18540558355 is 55385504581.

It is a de Polignac number, because none of the positive numbers 2^k-18540558355 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18540558299 and 18540558308.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 297582 + ... + 354451.

It is an arithmetic number, because the mean of its divisors is an integer number (1040646264).

Almost surely, 2^18540558355 is an apocalyptic number.

18540558355 is a deficient number, since it is larger than the sum of its proper divisors (6434951981).

18540558355 is a wasteful number, since it uses less digits than its factorization.

18540558355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652107 (or 652096 counting only the distinct ones).

The product of its (nonzero) digits is 2400000, while the sum is 49.

The spelling of 18540558355 in words is "eighteen billion, five hundred forty million, five hundred fifty-eight thousand, three hundred fifty-five".