20705753 has 2 divisors, whose sum is σ = 20705754. Its totient is φ = 20705752.

The previous prime is 20705701. The next prime is 20705767. The reversal of 20705753 is 35750702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16096144 + 4609609 = 4012^2 + 2147^2 .

It is a cyclic number.

It is not a de Polignac number, because 20705753 - 2¹⁰ = 20704729 is a prime.

It is not a weakly prime, because it can be changed into another prime (20705053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10352876 + 10352877.

It is an arithmetic number, because the mean of its divisors is an integer number (10352877).

Almost surely, 2^20705753 is an apocalyptic number.

It is an amenable number.

20705753 is a deficient number, since it is larger than the sum of its proper divisors (1).

20705753 is an equidigital number, since it uses as much as digits as its factorization.

20705753 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7350, while the sum is 29.

The square root of 20705753 is about 4550.3574584861. The cubic root of 20705753 is about 274.5977723006.

The spelling of 20705753 in words is "twenty million, seven hundred five thousand, seven hundred fifty-three".