17220996 has 72 divisors (see below), whose sum is σ = 48432384. Its totient is φ = 5123520.

The previous prime is 17220991. The next prime is 17221007. The reversal of 17220996 is 69902271.

17220996 is nontrivially palindromic in base 7.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 17220996.

It is not an unprimeable number, because it can be changed into a prime (17220991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13915 + ... + 15101.

It is an arithmetic number, because the mean of its divisors is an integer number (672672).

Almost surely, 2^17220996 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 17220996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24216192).

17220996 is an abundant number, since it is smaller than the sum of its proper divisors (31211388).

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

17220996 is a wasteful number, since it uses less digits than its factorization.

17220996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241 (or 1236 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 17220996 is about 4149.8187912245. The cubic root of 17220996 is about 258.2375673707.

The spelling of 17220996 in words is "seventeen million, two hundred twenty thousand, nine hundred ninety-six".