20632361 has 2 divisors, whose sum is σ = 20632362. Its totient is φ = 20632360.

The previous prime is 20632343. The next prime is 20632363. The reversal of 20632361 is 16323602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20529961 + 102400 = 4531^2 + 320^2 .

It is a cyclic number.

It is not a de Polignac number, because 20632361 - 2¹⁴ = 20615977 is a prime.

It is a Sophie Germain prime.

Together with 20632363, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is equal to p_1308137 and since 20632361 and 1308137 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (20632363) 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 as a sum of consecutive naturals, namely, 10316180 + 10316181.

It is an arithmetic number, because the mean of its divisors is an integer number (10316181).

Almost surely, 2^20632361 is an apocalyptic number.

It is an amenable number.

20632361 is a deficient number, since it is larger than the sum of its proper divisors (1).

20632361 is an equidigital number, since it uses as much as digits as its factorization.

20632361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 20632361 is about 4542.2858782776. The cubic root of 20632361 is about 274.2729489218.

Adding to 20632361 its reverse (16323602), we get a palindrome (36955963).

The spelling of 20632361 in words is "twenty million, six hundred thirty-two thousand, three hundred sixty-one".