20082521 has 2 divisors, whose sum is σ = 20082522. Its totient is φ = 20082520.

The previous prime is 20082499. The next prime is 20082539. The reversal of 20082521 is 12528002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19536400 + 546121 = 4420^2 + 739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20082521 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20082493 and 20082502.

It is not a weakly prime, because it can be changed into another prime (20082541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10041260 + 10041261.

It is an arithmetic number, because the mean of its divisors is an integer number (10041261).

Almost surely, 2^20082521 is an apocalyptic number.

It is an amenable number.

20082521 is a deficient number, since it is larger than the sum of its proper divisors (1).

20082521 is an equidigital number, since it uses as much as digits as its factorization.

20082521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 20082521 is about 4481.3525859945. The cubic root of 20082521 is about 271.8145768043.

The spelling of 20082521 in words is "twenty million, eighty-two thousand, five hundred twenty-one".