20590137 has 12 divisors (see below), whose sum is σ = 29830164. Its totient is φ = 13685760.

The previous prime is 20590133. The next prime is 20590139. The reversal of 20590137 is 73109502.

It can be written as a sum of positive squares in 2 ways, for example, as 14930496 + 5659641 = 3864^2 + 2379^2 .

It is not a de Polignac number, because 20590137 - 2² = 20590133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20590137.

It is not an unprimeable number, because it can be changed into a prime (20590133) 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, 64 + ... + 6417.

It is an arithmetic number, because the mean of its divisors is an integer number (2485847).

Almost surely, 2^20590137 is an apocalyptic number.

It is an amenable number.

20590137 is a deficient number, since it is larger than the sum of its proper divisors (9240027).

20590137 is a wasteful number, since it uses less digits than its factorization.

20590137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6840 (or 6837 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 20590137 is about 4537.6356178080. The cubic root of 20590137 is about 274.0857218424.

Adding to 20590137 its reverse (73109502), we get a palindrome (93699639).

The spelling of 20590137 in words is "twenty million, five hundred ninety thousand, one hundred thirty-seven".