20713365 has 12 divisors (see below), whose sum is σ = 35903244. Its totient is φ = 11047104.

The previous prime is 20713321. The next prime is 20713369. The reversal of 20713365 is 56331702.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7273809 + 13439556 = 2697^2 + 3666^2 .

It is not a de Polignac number, because 20713365 - 2⁸ = 20713109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20713369) 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 11 ways as a sum of consecutive naturals, for example, 230104 + ... + 230193.

It is an arithmetic number, because the mean of its divisors is an integer number (2991937).

Almost surely, 2^20713365 is an apocalyptic number.

It is an amenable number.

20713365 is a deficient number, since it is larger than the sum of its proper divisors (15189879).

20713365 is a wasteful number, since it uses less digits than its factorization.

20713365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460308 (or 460305 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 20713365 is about 4551.1937994333. The cubic root of 20713365 is about 274.6314180568.

The spelling of 20713365 in words is "twenty million, seven hundred thirteen thousand, three hundred sixty-five".