20443433 has 2 divisors, whose sum is σ = 20443434. Its totient is φ = 20443432.

The previous prime is 20443417. The next prime is 20443439. The reversal of 20443433 is 33434402.

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., 15389929 + 5053504 = 3923^2 + 2248^2 .

It is a cyclic number.

It is not a de Polignac number, because 20443433 - 2⁴ = 20443417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20443399 and 20443408.

It is not a weakly prime, because it can be changed into another prime (20443439) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221716 + 10221717.

It is an arithmetic number, because the mean of its divisors is an integer number (10221717).

Almost surely, 2^20443433 is an apocalyptic number.

It is an amenable number.

20443433 is a deficient number, since it is larger than the sum of its proper divisors (1).

20443433 is an equidigital number, since it uses as much as digits as its factorization.

20443433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 23.

The square root of 20443433 is about 4521.4414736896. The cubic root of 20443433 is about 273.4332193267.

Adding to 20443433 its reverse (33434402), we get a palindrome (53877835).

The spelling of 20443433 in words is "twenty million, four hundred forty-three thousand, four hundred thirty-three".