20454361 has 2 divisors, whose sum is σ = 20454362. Its totient is φ = 20454360.

The previous prime is 20454359. The next prime is 20454403. The reversal of 20454361 is 16345402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11182336 + 9272025 = 3344^2 + 3045^2 .

It is a cyclic number.

It is not a de Polignac number, because 20454361 - 2¹ = 20454359 is a prime.

Together with 20454359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20454311) 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, 10227180 + 10227181.

It is an arithmetic number, because the mean of its divisors is an integer number (10227181).

Almost surely, 2^20454361 is an apocalyptic number.

It is an amenable number.

20454361 is a deficient number, since it is larger than the sum of its proper divisors (1).

20454361 is an equidigital number, since it uses as much as digits as its factorization.

20454361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20454361 is about 4522.6497764032. The cubic root of 20454361 is about 273.4819317251.

Adding to 20454361 its reverse (16345402), we get a palindrome (36799763).

The spelling of 20454361 in words is "twenty million, four hundred fifty-four thousand, three hundred sixty-one".