20673253 has 2 divisors, whose sum is σ = 20673254. Its totient is φ = 20673252.

The previous prime is 20673229. The next prime is 20673271. The reversal of 20673253 is 35237602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17960644 + 2712609 = 4238^2 + 1647^2 .

It is a cyclic number.

It is not a de Polignac number, because 20673253 - 2²¹ = 18576101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20673203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10336626 + 10336627.

It is an arithmetic number, because the mean of its divisors is an integer number (10336627).

Almost surely, 2^20673253 is an apocalyptic number.

It is an amenable number.

20673253 is a deficient number, since it is larger than the sum of its proper divisors (1).

20673253 is an equidigital number, since it uses as much as digits as its factorization.

20673253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 28.

The square root of 20673253 is about 4546.7849080422. The cubic root of 20673253 is about 274.4540264059.

The spelling of 20673253 in words is "twenty million, six hundred seventy-three thousand, two hundred fifty-three".