20449343 has 2 divisors, whose sum is σ = 20449344. Its totient is φ = 20449342.

The previous prime is 20449337. The next prime is 20449391. The reversal of 20449343 is 34394402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20449343 - 2⁴ = 20449327 is a prime.

It is a Sophie Germain prime.

It is equal to p_1297235 and since 20449343 and 1297235 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20449313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10224671 + 10224672.

It is an arithmetic number, because the mean of its divisors is an integer number (10224672).

Almost surely, 2^20449343 is an apocalyptic number.

20449343 is a deficient number, since it is larger than the sum of its proper divisors (1).

20449343 is an equidigital number, since it uses as much as digits as its factorization.

20449343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 20449343 is about 4522.0949790998. The cubic root of 20449343 is about 273.4595657600.

The spelling of 20449343 in words is "twenty million, four hundred forty-nine thousand, three hundred forty-three".