20488901 has 2 divisors, whose sum is σ = 20488902. Its totient is φ = 20488900.

The previous prime is 20488891. The next prime is 20488903. The reversal of 20488901 is 10988402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20484676 + 4225 = 4526^2 + 65^2 .

It is a cyclic number.

It is not a de Polignac number, because 20488901 - 2¹⁰ = 20487877 is a prime.

Together with 20488903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20488903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10244450 + 10244451.

It is an arithmetic number, because the mean of its divisors is an integer number (10244451).

Almost surely, 2^20488901 is an apocalyptic number.

It is an amenable number.

20488901 is a deficient number, since it is larger than the sum of its proper divisors (1).

20488901 is an equidigital number, since it uses as much as digits as its factorization.

20488901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 20488901 is about 4526.4667236157. The cubic root of 20488901 is about 273.6357824354.

The spelling of 20488901 in words is "twenty million, four hundred eighty-eight thousand, nine hundred one".