20532317 has 6 divisors (see below), whose sum is σ = 22233402. Its totient is φ = 18952752.

The previous prime is 20532313. The next prime is 20532341. The reversal of 20532317 is 71323502.

It can be written as a sum of positive squares in 3 ways, for example, as 942841 + 19589476 = 971^2 + 4426^2 .

It is not a de Polignac number, because 20532317 - 2² = 20532313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20532292 and 20532301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20532313) 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 5 ways as a sum of consecutive naturals, for example, 60578 + ... + 60915.

It is an arithmetic number, because the mean of its divisors is an integer number (3705567).

Almost surely, 2^20532317 is an apocalyptic number.

It is an amenable number.

20532317 is a deficient number, since it is larger than the sum of its proper divisors (1701085).

20532317 is a wasteful number, since it uses less digits than its factorization.

20532317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121519 (or 121506 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 20532317 is about 4531.2599792994. The cubic root of 20532317 is about 273.8289242350.

Adding to 20532317 its reverse (71323502), we get a palindrome (91855819).

The spelling of 20532317 in words is "twenty million, five hundred thirty-two thousand, three hundred seventeen".