17961996 has 72 divisors (see below), whose sum is σ = 48145104. Its totient is φ = 5191680.

The previous prime is 17961967. The next prime is 17962039. The reversal of 17961996 is 69916971.

17961996 = 363² + 364² + ... + 466².

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34216 + ... + 34736.

It is an arithmetic number, because the mean of its divisors is an integer number (668682).

Almost surely, 2^17961996 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 17961996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24072552).

17961996 is an abundant number, since it is smaller than the sum of its proper divisors (30183108).

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

17961996 is a wasteful number, since it uses less digits than its factorization.

17961996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571 (or 556 counting only the distinct ones).

The product of its digits is 183708, while the sum is 48.

The square root of 17961996 is about 4238.1595062008. The cubic root of 17961996 is about 261.8895675068.

The spelling of 17961996 in words is "seventeen million, nine hundred sixty-one thousand, nine hundred ninety-six".