39896694018 has 96 divisors (see below), whose sum is σ = 97233514560. Its totient is φ = 12211223040.

The previous prime is 39896694007. The next prime is 39896694023. The reversal of 39896694018 is 81049669893.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 279853 + ... + 397631.

It is an arithmetic number, because the mean of its divisors is an integer number (1012849110).

Almost surely, 2^39896694018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39896694018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48616757280).

39896694018 is an abundant number, since it is smaller than the sum of its proper divisors (57336820542).

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

39896694018 is a wasteful number, since it uses less digits than its factorization.

39896694018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117854 (or 117842 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 63.

The spelling of 39896694018 in words is "thirty-nine billion, eight hundred ninety-six million, six hundred ninety-four thousand, eighteen".