20344453 has 2 divisors, whose sum is σ = 20344454. Its totient is φ = 20344452.

The previous prime is 20344447. The next prime is 20344469. The reversal of 20344453 is 35444302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19731364 + 613089 = 4442^2 + 783^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20344453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20344403) 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, 10172226 + 10172227.

It is an arithmetic number, because the mean of its divisors is an integer number (10172227).

Almost surely, 2^20344453 is an apocalyptic number.

It is an amenable number.

20344453 is a deficient number, since it is larger than the sum of its proper divisors (1).

20344453 is an equidigital number, since it uses as much as digits as its factorization.

20344453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 20344453 is about 4510.4825684177. The cubic root of 20344453 is about 272.9912156646.

Adding to 20344453 its reverse (35444302), we get a palindrome (55788755).

The spelling of 20344453 in words is "twenty million, three hundred forty-four thousand, four hundred fifty-three".