20736265 has 16 divisors (see below), whose sum is σ = 27308736. Its totient is φ = 14990400.

The previous prime is 20736263. The next prime is 20736319. The reversal of 20736265 is 56263702.

It is not a de Polignac number, because 20736265 - 2¹ = 20736263 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20736263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8914 + ... + 10996.

It is an arithmetic number, because the mean of its divisors is an integer number (1706796).

Almost surely, 2^20736265 is an apocalyptic number.

It is an amenable number.

20736265 is a deficient number, since it is larger than the sum of its proper divisors (6572471).

20736265 is a wasteful number, since it uses less digits than its factorization.

20736265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 20736265 is about 4553.7089278960. The cubic root of 20736265 is about 274.7325885368.

Adding to 20736265 its reverse (56263702), we get a palindrome (76999967).

It can be divided in two parts, 2073 and 6265, that added together give a palindrome (8338).

The spelling of 20736265 in words is "twenty million, seven hundred thirty-six thousand, two hundred sixty-five".