20933449 has 2 divisors, whose sum is σ = 20933450. Its totient is φ = 20933448.

The previous prime is 20933399. The next prime is 20933461. The reversal of 20933449 is 94433902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18662400 + 2271049 = 4320^2 + 1507^2 .

It is a cyclic number.

It is not a de Polignac number, because 20933449 - 2⁹ = 20932937 is a prime.

It is not a weakly prime, because it can be changed into another prime (20933489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10466724 + 10466725.

It is an arithmetic number, because the mean of its divisors is an integer number (10466725).

Almost surely, 2^20933449 is an apocalyptic number.

It is an amenable number.

20933449 is a deficient number, since it is larger than the sum of its proper divisors (1).

20933449 is an equidigital number, since it uses as much as digits as its factorization.

20933449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 20933449 is about 4575.3086234701. The cubic root of 20933449 is about 275.6006661089.

The spelling of 20933449 in words is "twenty million, nine hundred thirty-three thousand, four hundred forty-nine".