20888797 has 2 divisors, whose sum is σ = 20888798. Its totient is φ = 20888796.

The previous prime is 20888759. The next prime is 20888863. The reversal of 20888797 is 79788802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10719076 + 10169721 = 3274^2 + 3189^2 .

It is a cyclic number.

It is not a de Polignac number, because 20888797 - 2¹⁵ = 20856029 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20888797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20888717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10444398 + 10444399.

It is an arithmetic number, because the mean of its divisors is an integer number (10444399).

Almost surely, 2^20888797 is an apocalyptic number.

It is an amenable number.

20888797 is a deficient number, since it is larger than the sum of its proper divisors (1).

20888797 is an equidigital number, since it uses as much as digits as its factorization.

20888797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 451584, while the sum is 49.

The square root of 20888797 is about 4570.4263477273. The cubic root of 20888797 is about 275.4045703586.

The spelling of 20888797 in words is "twenty million, eight hundred eighty-eight thousand, seven hundred ninety-seven".