20936453 has 2 divisors, whose sum is σ = 20936454. Its totient is φ = 20936452.

The previous prime is 20936441. The next prime is 20936459. The reversal of 20936453 is 35463902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20811844 + 124609 = 4562^2 + 353^2 .

It is a cyclic number.

It is not a de Polignac number, because 20936453 - 2²² = 16742149 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20936459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10468226 + 10468227.

It is an arithmetic number, because the mean of its divisors is an integer number (10468227).

Almost surely, 2^20936453 is an apocalyptic number.

It is an amenable number.

20936453 is a deficient number, since it is larger than the sum of its proper divisors (1).

20936453 is an equidigital number, since it uses as much as digits as its factorization.

20936453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 20936453 is about 4575.6368955589. The cubic root of 20936453 is about 275.6138485966.

The spelling of 20936453 in words is "twenty million, nine hundred thirty-six thousand, four hundred fifty-three".