20128453 has 2 divisors, whose sum is σ = 20128454. Its totient is φ = 20128452.

The previous prime is 20128447. The next prime is 20128469. The reversal of 20128453 is 35482102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19210689 + 917764 = 4383^2 + 958^2 .

It is a cyclic number.

It is not a de Polignac number, because 20128453 - 2⁵ = 20128421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20128483) 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, 10064226 + 10064227.

It is an arithmetic number, because the mean of its divisors is an integer number (10064227).

Almost surely, 2^20128453 is an apocalyptic number.

It is an amenable number.

20128453 is a deficient number, since it is larger than the sum of its proper divisors (1).

20128453 is an equidigital number, since it uses as much as digits as its factorization.

20128453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20128453 is about 4486.4744510584. The cubic root of 20128453 is about 272.0216471021.

The spelling of 20128453 in words is "twenty million, one hundred twenty-eight thousand, four hundred fifty-three".