20756941 has 2 divisors, whose sum is σ = 20756942. Its totient is φ = 20756940.

The previous prime is 20756863. The next prime is 20756951. The reversal of 20756941 is 14965702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19766916 + 990025 = 4446^2 + 995^2 .

It is a cyclic number.

It is not a de Polignac number, because 20756941 - 2⁹ = 20756429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20756897 and 20756906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20756951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10378470 + 10378471.

It is an arithmetic number, because the mean of its divisors is an integer number (10378471).

Almost surely, 2^20756941 is an apocalyptic number.

It is an amenable number.

20756941 is a deficient number, since it is larger than the sum of its proper divisors (1).

20756941 is an equidigital number, since it uses as much as digits as its factorization.

20756941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 20756941 is about 4555.9785995986. The cubic root of 20756941 is about 274.8238695862.

The spelling of 20756941 in words is "twenty million, seven hundred fifty-six thousand, nine hundred forty-one".