20671033 has 2 divisors, whose sum is σ = 20671034. Its totient is φ = 20671032.

The previous prime is 20671019. The next prime is 20671073. The reversal of 20671033 is 33017602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19686969 + 984064 = 4437^2 + 992^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20671033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20670995 and 20671013.

It is not a weakly prime, because it can be changed into another prime (20671073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10335516 + 10335517.

It is an arithmetic number, because the mean of its divisors is an integer number (10335517).

Almost surely, 2^20671033 is an apocalyptic number.

It is an amenable number.

20671033 is a deficient number, since it is larger than the sum of its proper divisors (1).

20671033 is an equidigital number, since it uses as much as digits as its factorization.

20671033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 20671033 is about 4546.5407729394. The cubic root of 20671033 is about 274.4442019603. Note that the first 3 decimals are identical.

Adding to 20671033 its reverse (33017602), we get a palindrome (53688635).

It can be divided in two parts, 2067 and 1033, that multiplied together give a triangular number (2135211 = T₂₀₆₆).

The spelling of 20671033 in words is "twenty million, six hundred seventy-one thousand, thirty-three".