20752939 has 2 divisors, whose sum is σ = 20752940. Its totient is φ = 20752938.

The previous prime is 20752933. The next prime is 20752957. The reversal of 20752939 is 93925702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20752939 - 2⁷ = 20752811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20752898 and 20752907.

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, 10376469 + 10376470.

It is an arithmetic number, because the mean of its divisors is an integer number (10376470).

Almost surely, 2^20752939 is an apocalyptic number.

20752939 is a deficient number, since it is larger than the sum of its proper divisors (1).

20752939 is an equidigital number, since it uses as much as digits as its factorization.

20752939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 20752939 is about 4555.5393753100. The cubic root of 20752939 is about 274.8062061643.

The spelling of 20752939 in words is "twenty million, seven hundred fifty-two thousand, nine hundred thirty-nine".