20454233 has 2 divisors, whose sum is σ = 20454234. Its totient is φ = 20454232.

The previous prime is 20454223. The next prime is 20454257. The reversal of 20454233 is 33245402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16908544 + 3545689 = 4112^2 + 1883^2 .

It is a cyclic number.

It is not a de Polignac number, because 20454233 - 2⁶ = 20454169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20454199 and 20454208.

It is not a weakly prime, because it can be changed into another prime (20454223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10227116 + 10227117.

It is an arithmetic number, because the mean of its divisors is an integer number (10227117).

Almost surely, 2^20454233 is an apocalyptic number.

It is an amenable number.

20454233 is a deficient number, since it is larger than the sum of its proper divisors (1).

20454233 is an equidigital number, since it uses as much as digits as its factorization.

20454233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 20454233 is about 4522.6356253848. The cubic root of 20454233 is about 273.4813612557.

Adding to 20454233 its reverse (33245402), we get a palindrome (53699635).

The spelling of 20454233 in words is "twenty million, four hundred fifty-four thousand, two hundred thirty-three".