20433331 has 2 divisors, whose sum is σ = 20433332. Its totient is φ = 20433330.

The previous prime is 20433323. The next prime is 20433349. The reversal of 20433331 is 13333402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20433331 - 2³ = 20433323 is a prime.

It is a super-2 number, since 2×20433331² = 835042031511122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20433299 and 20433308.

It is not a weakly prime, because it can be changed into another prime (20436331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10216665 + 10216666.

It is an arithmetic number, because the mean of its divisors is an integer number (10216666).

Almost surely, 2^20433331 is an apocalyptic number.

20433331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20433331 is an equidigital number, since it uses as much as digits as its factorization.

20433331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 20433331 is about 4520.3242140360. The cubic root of 20433331 is about 273.3881734435.

Adding to 20433331 its reverse (13333402), we get a palindrome (33766733).

The spelling of 20433331 in words is "twenty million, four hundred thirty-three thousand, three hundred thirty-one".