20562013 has 4 divisors (see below), whose sum is σ = 20596828. Its totient is φ = 20527200.

The previous prime is 20562011. The next prime is 20562029. The reversal of 20562013 is 31026502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17665209 + 2896804 = 4203^2 + 1702^2 .

It is a cyclic number.

It is not a de Polignac number, because 20562013 - 2¹ = 20562011 is a prime.

It is a super-2 number, since 2×20562013² = 845592757224338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20562011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16506 + ... + 17707.

It is an arithmetic number, because the mean of its divisors is an integer number (5149207).

Almost surely, 2^20562013 is an apocalyptic number.

It is an amenable number.

20562013 is a deficient number, since it is larger than the sum of its proper divisors (34815).

20562013 is an equidigital number, since it uses as much as digits as its factorization.

20562013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34814.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 20562013 is about 4534.5355881281. The cubic root of 20562013 is about 273.9608740552.

Adding to 20562013 its reverse (31026502), we get a palindrome (51588515).

The spelling of 20562013 in words is "twenty million, five hundred sixty-two thousand, thirteen".