20741764 has 12 divisors (see below), whose sum is σ = 36658188. Its totient is φ = 10268000.

The previous prime is 20741761. The next prime is 20741771. The reversal of 20741764 is 46714702.

It can be written as a sum of positive squares in 2 ways, for example, as 18662400 + 2079364 = 4320^2 + 1442^2 .

It is not an unprimeable number, because it can be changed into a prime (20741761) by changing a digit.

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, 25267 + ... + 26074.

It is an arithmetic number, because the mean of its divisors is an integer number (3054849).

Almost surely, 2^20741764 is an apocalyptic number.

It is an amenable number.

20741764 is a deficient number, since it is larger than the sum of its proper divisors (15916424).

20741764 is a wasteful number, since it uses less digits than its factorization.

20741764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51446 (or 51444 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 20741764 is about 4554.3126814043. The cubic root of 20741764 is about 274.7568716141.

The spelling of 20741764 in words is "twenty million, seven hundred forty-one thousand, seven hundred sixty-four".