20810049 has 16 divisors (see below), whose sum is σ = 30519552. Its totient is φ = 12532608.

The previous prime is 20810033. The next prime is 20810063. The reversal of 20810049 is 94001802.

It is not a de Polignac number, because 20810049 - 2⁴ = 20810033 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20810549) 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 in 15 ways as a sum of consecutive naturals, for example, 3844 + ... + 7509.

It is an arithmetic number, because the mean of its divisors is an integer number (1907472).

Almost surely, 2^20810049 is an apocalyptic number.

It is an amenable number.

20810049 is a deficient number, since it is larger than the sum of its proper divisors (9709503).

20810049 is a wasteful number, since it uses less digits than its factorization.

20810049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11416.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 20810049 is about 4561.8032618691. The cubic root of 20810049 is about 275.0580549608.

The spelling of 20810049 in words is "twenty million, eight hundred ten thousand, forty-nine".