20848489 has 2 divisors, whose sum is σ = 20848490. Its totient is φ = 20848488.

The previous prime is 20848423. The next prime is 20848543. The reversal of 20848489 is 98484802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18774889 + 2073600 = 4333^2 + 1440^2 .

It is a cyclic number.

It is not a de Polignac number, because 20848489 - 2⁹ = 20847977 is a prime.

It is not a weakly prime, because it can be changed into another prime (20840489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10424244 + 10424245.

It is an arithmetic number, because the mean of its divisors is an integer number (10424245).

Almost surely, 2^20848489 is an apocalyptic number.

It is an amenable number.

20848489 is a deficient number, since it is larger than the sum of its proper divisors (1).

20848489 is an equidigital number, since it uses as much as digits as its factorization.

20848489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147456, while the sum is 43.

The square root of 20848489 is about 4566.0145641467. The cubic root of 20848489 is about 275.2273117795.

The spelling of 20848489 in words is "twenty million, eight hundred forty-eight thousand, four hundred eighty-nine".