20810735 has 16 divisors (see below), whose sum is σ = 27343872. Its totient is φ = 15079200.

The previous prime is 20810731. The next prime is 20810743. The reversal of 20810735 is 53701802.

It is not a de Polignac number, because 20810735 - 2² = 20810731 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20810731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19670 + ... + 20700.

It is an arithmetic number, because the mean of its divisors is an integer number (1708992).

Almost surely, 2^20810735 is an apocalyptic number.

20810735 is a deficient number, since it is larger than the sum of its proper divisors (6533137).

20810735 is a wasteful number, since it uses less digits than its factorization.

20810735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 20810735 is about 4561.8784508139. The cubic root of 20810735 is about 275.0610773428.

The spelling of 20810735 in words is "twenty million, eight hundred ten thousand, seven hundred thirty-five".