20849029 has 2 divisors, whose sum is σ = 20849030. Its totient is φ = 20849028.

The previous prime is 20849011. The next prime is 20849041. The reversal of 20849029 is 92094802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19802500 + 1046529 = 4450^2 + 1023^2 .

It is a cyclic number.

It is not a de Polignac number, because 20849029 - 2⁷ = 20848901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20848985 and 20849003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20849009) 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, 10424514 + 10424515.

It is an arithmetic number, because the mean of its divisors is an integer number (10424515).

Almost surely, 2^20849029 is an apocalyptic number.

It is an amenable number.

20849029 is a deficient number, since it is larger than the sum of its proper divisors (1).

20849029 is an equidigital number, since it uses as much as digits as its factorization.

20849029 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 34.

The square root of 20849029 is about 4566.0736962953. The cubic root of 20849029 is about 275.2296879943.

The spelling of 20849029 in words is "twenty million, eight hundred forty-nine thousand, twenty-nine".