20814544 has 20 divisors (see below), whose sum is σ = 40408996. Its totient is φ = 10386432.

The previous prime is 20814539. The next prime is 20814559. The reversal of 20814544 is 44541802.

It can be written as a sum of positive squares in 2 ways, for example, as 10497600 + 10316944 = 3240^2 + 3212^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9802 + ... + 11734.

Almost surely, 2^20814544 is an apocalyptic number.

It is an amenable number.

20814544 is a deficient number, since it is larger than the sum of its proper divisors (19594452).

20814544 is a wasteful number, since it uses less digits than its factorization.

20814544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2614 (or 2608 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 20814544 is about 4562.2959132437. The cubic root of 20814544 is about 275.0778578447.

The spelling of 20814544 in words is "twenty million, eight hundred fourteen thousand, five hundred forty-four".