20752973 has 2 divisors, whose sum is σ = 20752974. Its totient is φ = 20752972.

The previous prime is 20752957. The next prime is 20753017. The reversal of 20752973 is 37925702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11377129 + 9375844 = 3373^2 + 3062^2 .

It is a cyclic number.

It is not a de Polignac number, because 20752973 - 2⁴ = 20752957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20752933) 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, 10376486 + 10376487.

It is an arithmetic number, because the mean of its divisors is an integer number (10376487).

Almost surely, 2^20752973 is an apocalyptic number.

It is an amenable number.

20752973 is a deficient number, since it is larger than the sum of its proper divisors (1).

20752973 is an equidigital number, since it uses as much as digits as its factorization.

20752973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 20752973 is about 4555.5431070291. The cubic root of 20752973 is about 274.8063562380.

The spelling of 20752973 in words is "twenty million, seven hundred fifty-two thousand, nine hundred seventy-three".