18742339968 has 128 divisors (see below), whose sum is σ = 55335571200. Its totient is φ = 5572270080.

The previous prime is 18742339943. The next prime is 18742339991. The reversal of 18742339968 is 86993324781.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 182013 + ... + 265731.

It is an arithmetic number, because the mean of its divisors is an integer number (432309150).

Almost surely, 2^18742339968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18742339968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27667785600).

18742339968 is an abundant number, since it is smaller than the sum of its proper divisors (36593231232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18742339968 is a wasteful number, since it uses less digits than its factorization.

18742339968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83800 (or 83788 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 60.

The spelling of 18742339968 in words is "eighteen billion, seven hundred forty-two million, three hundred thirty-nine thousand, nine hundred sixty-eight".