20426233 has 2 divisors, whose sum is σ = 20426234. Its totient is φ = 20426232.

The previous prime is 20426209. The next prime is 20426243. The reversal of 20426233 is 33262402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20142144 + 284089 = 4488^2 + 533^2 .

It is a cyclic number.

It is not a de Polignac number, because 20426233 - 2⁵ = 20426201 is a prime.

It is not a weakly prime, because it can be changed into another prime (20426243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10213116 + 10213117.

It is an arithmetic number, because the mean of its divisors is an integer number (10213117).

Almost surely, 2^20426233 is an apocalyptic number.

It is an amenable number.

20426233 is a deficient number, since it is larger than the sum of its proper divisors (1).

20426233 is an equidigital number, since it uses as much as digits as its factorization.

20426233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 20426233 is about 4519.5390251662. The cubic root of 20426233 is about 273.3565138316.

Adding to 20426233 its reverse (33262402), we get a palindrome (53688635).

The spelling of 20426233 in words is "twenty million, four hundred twenty-six thousand, two hundred thirty-three".