20717022 has 16 divisors (see below), whose sum is σ = 41513472. Its totient is φ = 6892440.

The previous prime is 20716987. The next prime is 20717023. The reversal of 20717022 is 22071702.

It is a self number, because there is not a number n which added to its sum of digits gives 20717022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20717023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403 + ... + 6449.

It is an arithmetic number, because the mean of its divisors is an integer number (2594592).

Almost surely, 2^20717022 is an apocalyptic number.

20717022 is an abundant number, since it is smaller than the sum of its proper divisors (20796450).

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

20717022 is a wasteful number, since it uses less digits than its factorization.

20717022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6623.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 20717022 is about 4551.5955444218. The cubic root of 20717022 is about 274.6475794096.

Adding to 20717022 its reverse (22071702), we get a palindrome (42788724).

The spelling of 20717022 in words is "twenty million, seven hundred seventeen thousand, twenty-two".