20894617 has 2 divisors, whose sum is σ = 20894618. Its totient is φ = 20894616.

The previous prime is 20894609. The next prime is 20894633. The reversal of 20894617 is 71649802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20894041 + 576 = 4571^2 + 24^2 .

It is a cyclic number.

It is not a de Polignac number, because 20894617 - 2³ = 20894609 is a prime.

It is not a weakly prime, because it can be changed into another prime (20894417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10447308 + 10447309.

It is an arithmetic number, because the mean of its divisors is an integer number (10447309).

Almost surely, 2^20894617 is an apocalyptic number.

It is an amenable number.

20894617 is a deficient number, since it is larger than the sum of its proper divisors (1).

20894617 is an equidigital number, since it uses as much as digits as its factorization.

20894617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 20894617 is about 4571.0630054726. The cubic root of 20894617 is about 275.4301455631.

The spelling of 20894617 in words is "twenty million, eight hundred ninety-four thousand, six hundred seventeen".