20939033 has 2 divisors, whose sum is σ = 20939034. Its totient is φ = 20939032.

The previous prime is 20939027. The next prime is 20939057. The reversal of 20939033 is 33093902.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10679824 + 10259209 = 3268^2 + 3203^2 .

It is a cyclic number.

It is not a de Polignac number, because 20939033 - 2⁸ = 20938777 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20938987 and 20939005.

It is not a weakly prime, because it can be changed into another prime (20939063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10469516 + 10469517.

It is an arithmetic number, because the mean of its divisors is an integer number (10469517).

Almost surely, 2^20939033 is an apocalyptic number.

It is an amenable number.

20939033 is a deficient number, since it is larger than the sum of its proper divisors (1).

20939033 is an equidigital number, since it uses as much as digits as its factorization.

20939033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 29.

The square root of 20939033 is about 4575.9188148393. The cubic root of 20939033 is about 275.6251694338.

The spelling of 20939033 in words is "twenty million, nine hundred thirty-nine thousand, thirty-three".