20725753 has 2 divisors, whose sum is σ = 20725754. Its totient is φ = 20725752.

The previous prime is 20725741. The next prime is 20725769. The reversal of 20725753 is 35752702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13897984 + 6827769 = 3728^2 + 2613^2 .

It is a cyclic number.

It is not a de Polignac number, because 20725753 - 2⁵ = 20725721 is a prime.

It is not a weakly prime, because it can be changed into another prime (20725723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10362876 + 10362877.

It is an arithmetic number, because the mean of its divisors is an integer number (10362877).

Almost surely, 2^20725753 is an apocalyptic number.

It is an amenable number.

20725753 is a deficient number, since it is larger than the sum of its proper divisors (1).

20725753 is an equidigital number, since it uses as much as digits as its factorization.

20725753 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14700, while the sum is 31.

The square root of 20725753 is about 4552.5545576083. The cubic root of 20725753 is about 274.6861565633.

The spelling of 20725753 in words is "twenty million, seven hundred twenty-five thousand, seven hundred fifty-three".