18534647642 has 16 divisors (see below), whose sum is σ = 32070634560. Its totient is φ = 7869182208.

The previous prime is 18534647617. The next prime is 18534647693. The reversal of 18534647642 is 24674643581.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6184967 + ... + 6187962.

It is an arithmetic number, because the mean of its divisors is an integer number (2004414660).

Almost surely, 2^18534647642 is an apocalyptic number.

18534647642 is a deficient number, since it is larger than the sum of its proper divisors (13535986918).

18534647642 is a wasteful number, since it uses less digits than its factorization.

18534647642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12373045.

The product of its digits is 3870720, while the sum is 50.

The spelling of 18534647642 in words is "eighteen billion, five hundred thirty-four million, six hundred forty-seven thousand, six hundred forty-two".