18039259434616 has 64 divisors (see below), whose sum is σ = 40354015910400. Its totient is φ = 7391715585408.

The previous prime is 18039259434541. The next prime is 18039259434661. The reversal of 18039259434616 is 61643495293081.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163830 + ... + 6008773.

It is an arithmetic number, because the mean of its divisors is an integer number (630531498600).

Almost surely, 2^{18039259434616} 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 18039259434616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20177007955200).

18039259434616 is an abundant number, since it is smaller than the sum of its proper divisors (22314756475784).

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

18039259434616 is a wasteful number, since it uses less digits than its factorization.

18039259434616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6174908 (or 6174904 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 61.

The spelling of 18039259434616 in words is "eighteen trillion, thirty-nine billion, two hundred fifty-nine million, four hundred thirty-four thousand, six hundred sixteen".