20575433 has 2 divisors, whose sum is σ = 20575434. Its totient is φ = 20575432.

The previous prime is 20575403. The next prime is 20575439. The reversal of 20575433 is 33457502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17875984 + 2699449 = 4228^2 + 1643^2 .

It is a cyclic number.

It is not a de Polignac number, because 20575433 - 2⁶ = 20575369 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20575396 and 20575405.

It is not a weakly prime, because it can be changed into another prime (20575439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10287716 + 10287717.

It is an arithmetic number, because the mean of its divisors is an integer number (10287717).

Almost surely, 2^20575433 is an apocalyptic number.

It is an amenable number.

20575433 is a deficient number, since it is larger than the sum of its proper divisors (1).

20575433 is an equidigital number, since it uses as much as digits as its factorization.

20575433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 29.

The square root of 20575433 is about 4536.0151013858. The cubic root of 20575433 is about 274.0204621797.

The spelling of 20575433 in words is "twenty million, five hundred seventy-five thousand, four hundred thirty-three".