17940927816 has 320 divisors, whose sum is σ = 59746896000. Its totient is φ = 5025960576.

The previous prime is 17940927773. The next prime is 17940927841. The reversal of 17940927816 is 61872904971.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 11779231 + ... + 11780753.

It is an arithmetic number, because the mean of its divisors is an integer number (186709050).

Almost surely, 2^17940927816 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 17940927816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29873448000).

17940927816 is an abundant number, since it is smaller than the sum of its proper divisors (41805968184).

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

17940927816 is a wasteful number, since it uses less digits than its factorization.

17940927816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615 (or 1588 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The spelling of 17940927816 in words is "seventeen billion, nine hundred forty million, nine hundred twenty-seven thousand, eight hundred sixteen".