20973269 has 2 divisors, whose sum is σ = 20973270. Its totient is φ = 20973268.

The previous prime is 20973241. The next prime is 20973287. The reversal of 20973269 is 96237902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20566225 + 407044 = 4535^2 + 638^2 .

It is a cyclic number.

It is not a de Polignac number, because 20973269 - 2¹² = 20969173 is a prime.

It is a super-2 number, since 2×20973269² = 879756025092722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20973229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10486634 + 10486635.

It is an arithmetic number, because the mean of its divisors is an integer number (10486635).

Almost surely, 2^20973269 is an apocalyptic number.

It is an amenable number.

20973269 is a deficient number, since it is larger than the sum of its proper divisors (1).

20973269 is an equidigital number, since it uses as much as digits as its factorization.

20973269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 20973269 is about 4579.6581750170. The cubic root of 20973269 is about 275.7753063428.

The spelling of 20973269 in words is "twenty million, nine hundred seventy-three thousand, two hundred sixty-nine".