20039933 has 2 divisors, whose sum is σ = 20039934. Its totient is φ = 20039932.

The previous prime is 20039893. The next prime is 20039953. The reversal of 20039933 is 33993002.

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., 16345849 + 3694084 = 4043^2 + 1922^2 .

It is a cyclic number.

It is not a de Polignac number, because 20039933 - 2⁶ = 20039869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20039896 and 20039905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20039953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10019966 + 10019967.

It is an arithmetic number, because the mean of its divisors is an integer number (10019967).

Almost surely, 2^20039933 is an apocalyptic number.

It is an amenable number.

20039933 is a deficient number, since it is larger than the sum of its proper divisors (1).

20039933 is an equidigital number, since it uses as much as digits as its factorization.

20039933 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 20039933 is about 4476.5983737655. The cubic root of 20039933 is about 271.6222996202.

The spelling of 20039933 in words is "twenty million, thirty-nine thousand, nine hundred thirty-three".