20226817 has 16 divisors (see below), whose sum is σ = 22558032. Its totient is φ = 18017280.

The previous prime is 20226799. The next prime is 20226823. The reversal of 20226817 is 71862202.

It can be written as a sum of positive squares in 8 ways, for example, as 6677056 + 13549761 = 2584^2 + 3681^2 .

It is a cyclic number.

It is not a de Polignac number, because 20226817 - 2¹⁵ = 20194049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20226847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72883 + ... + 73159.

It is an arithmetic number, because the mean of its divisors is an integer number (1409877).

Almost surely, 2^20226817 is an apocalyptic number.

It is an amenable number.

20226817 is a deficient number, since it is larger than the sum of its proper divisors (2331215).

20226817 is a wasteful number, since it uses less digits than its factorization.

20226817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 20226817 is about 4497.4233734440. The cubic root of 20226817 is about 272.4640336337.

The spelling of 20226817 in words is "twenty million, two hundred twenty-six thousand, eight hundred seventeen".