20580137 has 4 divisors (see below), whose sum is σ = 20603220. Its totient is φ = 20557056.

The previous prime is 20580127. The next prime is 20580163. The reversal of 20580137 is 73108502.

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 724201 + 19855936 = 851^2 + 4456^2 .

It is a cyclic number.

It is not a de Polignac number, because 20580137 - 2¹⁰ = 20579113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20580107) 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 3 ways as a sum of consecutive naturals, for example, 10148 + ... + 12005.

It is an arithmetic number, because the mean of its divisors is an integer number (5150805).

Almost surely, 2^20580137 is an apocalyptic number.

It is an amenable number.

20580137 is a deficient number, since it is larger than the sum of its proper divisors (23083).

20580137 is an equidigital number, since it uses as much as digits as its factorization.

20580137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23082.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 20580137 is about 4536.5335885453. The cubic root of 20580137 is about 274.0413429722.

Adding to 20580137 its reverse (73108502), we get a palindrome (93688639).

The spelling of 20580137 in words is "twenty million, five hundred eighty thousand, one hundred thirty-seven".