20810744 has 16 divisors (see below), whose sum is σ = 39149520. Its totient is φ = 10370880.

The previous prime is 20810743. The next prime is 20810749. The reversal of 20810744 is 44701802.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20810743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1652 + ... + 6659.

It is an arithmetic number, because the mean of its divisors is an integer number (2446845).

Almost surely, 2^20810744 is an apocalyptic number.

It is an amenable number.

20810744 is a deficient number, since it is larger than the sum of its proper divisors (18338776).

20810744 is a wasteful number, since it uses less digits than its factorization.

20810744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8630 (or 8626 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 20810744 is about 4561.8794372495. The cubic root of 20810744 is about 275.0611169946.

The spelling of 20810744 in words is "twenty million, eight hundred ten thousand, seven hundred forty-four".