20798573 has 2 divisors, whose sum is σ = 20798574. Its totient is φ = 20798572.

The previous prime is 20798549. The next prime is 20798587. The reversal of 20798573 is 37589702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20187049 + 611524 = 4493^2 + 782^2 .

It is a cyclic number.

It is not a de Polignac number, because 20798573 - 2⁸ = 20798317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20798573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20798543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10399286 + 10399287.

It is an arithmetic number, because the mean of its divisors is an integer number (10399287).

Almost surely, 2^20798573 is an apocalyptic number.

It is an amenable number.

20798573 is a deficient number, since it is larger than the sum of its proper divisors (1).

20798573 is an equidigital number, since it uses as much as digits as its factorization.

20798573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 20798573 is about 4560.5452524890. The cubic root of 20798573 is about 275.0074840938.

The spelling of 20798573 in words is "twenty million, seven hundred ninety-eight thousand, five hundred seventy-three".