20603489 has 2 divisors, whose sum is σ = 20603490. Its totient is φ = 20603488.

The previous prime is 20603483. The next prime is 20603501. The reversal of 20603489 is 98430602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19536400 + 1067089 = 4420^2 + 1033^2 .

It is a cyclic number.

It is not a de Polignac number, because 20603489 - 2¹⁶ = 20537953 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20603483) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10301744 + 10301745.

It is an arithmetic number, because the mean of its divisors is an integer number (10301745).

Almost surely, 2^20603489 is an apocalyptic number.

It is an amenable number.

20603489 is a deficient number, since it is larger than the sum of its proper divisors (1).

20603489 is an equidigital number, since it uses as much as digits as its factorization.

20603489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 20603489 is about 4539.1066301641. The cubic root of 20603489 is about 274.1449541147.

The spelling of 20603489 in words is "twenty million, six hundred three thousand, four hundred eighty-nine".