20206453 has 2 divisors, whose sum is σ = 20206454. Its totient is φ = 20206452.

The previous prime is 20206427. The next prime is 20206493. The reversal of 20206453 is 35460202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18722929 + 1483524 = 4327^2 + 1218^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20206453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20206493) 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, 10103226 + 10103227.

It is an arithmetic number, because the mean of its divisors is an integer number (10103227).

Almost surely, 2^20206453 is an apocalyptic number.

It is an amenable number.

20206453 is a deficient number, since it is larger than the sum of its proper divisors (1).

20206453 is an equidigital number, since it uses as much as digits as its factorization.

20206453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 20206453 is about 4495.1588403526. The cubic root of 20206453 is about 272.3725656146.

Adding to 20206453 its reverse (35460202), we get a palindrome (55666655).

The spelling of 20206453 in words is "twenty million, two hundred six thousand, four hundred fifty-three".