20554453 has 2 divisors, whose sum is σ = 20554454. Its totient is φ = 20554452.

The previous prime is 20554441. The next prime is 20554477. The reversal of 20554453 is 35445502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20412324 + 142129 = 4518^2 + 377^2 .

It is a cyclic number.

It is not a de Polignac number, because 20554453 - 2⁵ = 20554421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20554493) 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, 10277226 + 10277227.

It is an arithmetic number, because the mean of its divisors is an integer number (10277227).

Almost surely, 2^20554453 is an apocalyptic number.

It is an amenable number.

20554453 is a deficient number, since it is larger than the sum of its proper divisors (1).

20554453 is an equidigital number, since it uses as much as digits as its factorization.

20554453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 20554453 is about 4533.7019090364. The cubic root of 20554453 is about 273.9272943648.

Adding to 20554453 its reverse (35445502), we get a palindrome (55999955).

The spelling of 20554453 in words is "twenty million, five hundred fifty-four thousand, four hundred fifty-three".