18705476999135 has 4 divisors (see below), whose sum is σ = 22446572398968. Its totient is φ = 14964381599304.

The previous prime is 18705476999107. The next prime is 18705476999141. The reversal of 18705476999135 is 53199967450781.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18705476999135 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1870547699909 + ... + 1870547699918.

It is an arithmetic number, because the mean of its divisors is an integer number (5611643099742).

Almost surely, 2^{18705476999135} is an apocalyptic number.

18705476999135 is a deficient number, since it is larger than the sum of its proper divisors (3741095399833).

18705476999135 is an equidigital number, since it uses as much as digits as its factorization.

18705476999135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3741095399832.

The product of its (nonzero) digits is 514382400, while the sum is 74.

The spelling of 18705476999135 in words is "eighteen trillion, seven hundred five billion, four hundred seventy-six million, nine hundred ninety-nine thousand, one hundred thirty-five".