20466577 has 2 divisors, whose sum is σ = 20466578. Its totient is φ = 20466576.

The previous prime is 20466497. The next prime is 20466583. The reversal of 20466577 is 77566402.

It is a Cunningham number, because it is equal to 4524²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20466576 + 1 = 4524^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 20466577 - 2¹¹ = 20464529 is a prime.

It is not a weakly prime, because it can be changed into another prime (20466377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10233288 + 10233289.

It is an arithmetic number, because the mean of its divisors is an integer number (10233289).

Almost surely, 2^20466577 is an apocalyptic number.

It is an amenable number.

20466577 is a deficient number, since it is larger than the sum of its proper divisors (1).

20466577 is an equidigital number, since it uses as much as digits as its factorization.

20466577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 20466577 is about 4524.0001105217. Note that the first 3 decimals coincide. The cubic root of 20466577 is about 273.5363649485.

The spelling of 20466577 in words is "twenty million, four hundred sixty-six thousand, five hundred seventy-seven".