20272489 has 2 divisors, whose sum is σ = 20272490. Its totient is φ = 20272488.

The previous prime is 20272471. The next prime is 20272529. The reversal of 20272489 is 98427202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16000000 + 4272489 = 4000^2 + 2067^2 .

It is a cyclic number.

It is not a de Polignac number, because 20272489 - 2⁵ = 20272457 is a prime.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (20272289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10136244 + 10136245.

It is an arithmetic number, because the mean of its divisors is an integer number (10136245).

Almost surely, 2^20272489 is an apocalyptic number.

It is an amenable number.

20272489 is a deficient number, since it is larger than the sum of its proper divisors (1).

20272489 is an equidigital number, since it uses as much as digits as its factorization.

20272489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 20272489 is about 4502.4980843971. The cubic root of 20272489 is about 272.6689533852.

The spelling of 20272489 in words is "twenty million, two hundred seventy-two thousand, four hundred eighty-nine".