20590453 has 12 divisors (see below), whose sum is σ = 22615140. Its totient is φ = 18734976.

The previous prime is 20590439. The next prime is 20590457. The reversal of 20590453 is 35409502.

It can be written as a sum of positive squares in 6 ways, for example, as 2289169 + 18301284 = 1513^2 + 4278^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20590453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20590457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11503 + ... + 13171.

It is an arithmetic number, because the mean of its divisors is an integer number (1884595).

Almost surely, 2^20590453 is an apocalyptic number.

It is an amenable number.

20590453 is a deficient number, since it is larger than the sum of its proper divisors (2024687).

20590453 is a wasteful number, since it uses less digits than its factorization.

20590453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768 (or 1755 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 20590453 is about 4537.6704375704. The cubic root of 20590453 is about 274.0871239805.

Adding to 20590453 its reverse (35409502), we get a palindrome (55999955).

The spelling of 20590453 in words is "twenty million, five hundred ninety thousand, four hundred fifty-three".