18487467865 has 16 divisors (see below), whose sum is σ = 22257244800. Its totient is φ = 14741850112.

The previous prime is 18487467863. The next prime is 18487467871. The reversal of 18487467865 is 56876478481.

It is a cyclic number.

It is not a de Polignac number, because 18487467865 - 2¹ = 18487467863 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18487467797 and 18487467806.

It is not an unprimeable number, because it can be changed into a prime (18487467863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2948724 + ... + 2954986.

It is an arithmetic number, because the mean of its divisors is an integer number (1391077800).

Almost surely, 2^18487467865 is an apocalyptic number.

It is an amenable number.

18487467865 is a deficient number, since it is larger than the sum of its proper divisors (3769776935).

18487467865 is a wasteful number, since it uses less digits than its factorization.

18487467865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8096.

The product of its digits is 72253440, while the sum is 64.

The spelling of 18487467865 in words is "eighteen billion, four hundred eighty-seven million, four hundred sixty-seven thousand, eight hundred sixty-five".