20545736 has 16 divisors (see below), whose sum is σ = 38595840. Its totient is φ = 10253520.

The previous prime is 20545711. The next prime is 20545769. The reversal of 20545736 is 63754502.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2741 + ... + 6971.

It is an arithmetic number, because the mean of its divisors is an integer number (2412240).

Almost surely, 2^20545736 is an apocalyptic number.

It is an amenable number.

20545736 is a deficient number, since it is larger than the sum of its proper divisors (18050104).

20545736 is a wasteful number, since it uses less digits than its factorization.

20545736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4844 (or 4840 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 20545736 is about 4532.7404514267. The cubic root of 20545736 is about 273.8885653384. Note that the first 3 decimals are identical.

The spelling of 20545736 in words is "twenty million, five hundred forty-five thousand, seven hundred thirty-six".