20047253 has 2 divisors, whose sum is σ = 20047254. Its totient is φ = 20047252.

The previous prime is 20047241. The next prime is 20047259. The reversal of 20047253 is 35274002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19518724 + 528529 = 4418^2 + 727^2 .

It is a cyclic number.

It is not a de Polignac number, because 20047253 - 2⁶ = 20047189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20047259) 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, 10023626 + 10023627.

It is an arithmetic number, because the mean of its divisors is an integer number (10023627).

Almost surely, 2^20047253 is an apocalyptic number.

It is an amenable number.

20047253 is a deficient number, since it is larger than the sum of its proper divisors (1).

20047253 is an equidigital number, since it uses as much as digits as its factorization.

20047253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 20047253 is about 4477.4158841903. The cubic root of 20047253 is about 271.6553674818.

The spelling of 20047253 in words is "twenty million, forty-seven thousand, two hundred fifty-three".