20212453 has 2 divisors, whose sum is σ = 20212454. Its totient is φ = 20212452.

The previous prime is 20212421. The next prime is 20212457. The reversal of 20212453 is 35421202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11819844 + 8392609 = 3438^2 + 2897^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212453 - 2⁵ = 20212421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20212453.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212457) 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, 10106226 + 10106227.

It is an arithmetic number, because the mean of its divisors is an integer number (10106227).

Almost surely, 2^20212453 is an apocalyptic number.

It is an amenable number.

20212453 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212453 is an equidigital number, since it uses as much as digits as its factorization.

20212453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20212453 is about 4495.8261754654. The cubic root of 20212453 is about 272.3995219153.

Adding to 20212453 its reverse (35421202), we get a palindrome (55633655).

The spelling of 20212453 in words is "twenty million, two hundred twelve thousand, four hundred fifty-three".