20945713 has 2 divisors, whose sum is σ = 20945714. Its totient is φ = 20945712.

The previous prime is 20945707. The next prime is 20945723. The reversal of 20945713 is 31754902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18045504 + 2900209 = 4248^2 + 1703^2 .

It is a cyclic number.

It is not a de Polignac number, because 20945713 - 2¹⁷ = 20814641 is a prime.

It is not a weakly prime, because it can be changed into another prime (20945723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10472856 + 10472857.

It is an arithmetic number, because the mean of its divisors is an integer number (10472857).

Almost surely, 2^20945713 is an apocalyptic number.

It is an amenable number.

20945713 is a deficient number, since it is larger than the sum of its proper divisors (1).

20945713 is an equidigital number, since it uses as much as digits as its factorization.

20945713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 20945713 is about 4576.6486646890. The cubic root of 20945713 is about 275.6544764283.

The spelling of 20945713 in words is "twenty million, nine hundred forty-five thousand, seven hundred thirteen".