18734406844 has 36 divisors (see below), whose sum is σ = 36233516592. Its totient is φ = 8430442240.

The previous prime is 18734406811. The next prime is 18734406851. The reversal of 18734406844 is 44860443781.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5411274 + ... + 5414734.

It is an arithmetic number, because the mean of its divisors is an integer number (1006486572).

Almost surely, 2^18734406844 is an apocalyptic number.

It is an amenable number.

18734406844 is a deficient number, since it is larger than the sum of its proper divisors (17499109748).

18734406844 is an equidigital number, since it uses as much as digits as its factorization.

18734406844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6966 (or 3503 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 49.

The spelling of 18734406844 in words is "eighteen billion, seven hundred thirty-four million, four hundred six thousand, eight hundred forty-four".