20750461 has 2 divisors, whose sum is σ = 20750462. Its totient is φ = 20750460.

The previous prime is 20750459. The next prime is 20750473. The reversal of 20750461 is 16405702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20702500 + 47961 = 4550^2 + 219^2 .

It is a cyclic number.

It is not a de Polignac number, because 20750461 - 2¹ = 20750459 is a prime.

Together with 20750459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20750441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10375230 + 10375231.

It is an arithmetic number, because the mean of its divisors is an integer number (10375231).

Almost surely, 2^20750461 is an apocalyptic number.

It is an amenable number.

20750461 is a deficient number, since it is larger than the sum of its proper divisors (1).

20750461 is an equidigital number, since it uses as much as digits as its factorization.

20750461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 20750461 is about 4555.2673906150. The cubic root of 20750461 is about 274.7952680046.

The spelling of 20750461 in words is "twenty million, seven hundred fifty thousand, four hundred sixty-one".