20124361 has 2 divisors, whose sum is σ = 20124362. Its totient is φ = 20124360.

The previous prime is 20124359. The next prime is 20124371. The reversal of 20124361 is 16342102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12390400 + 7733961 = 3520^2 + 2781^2 .

It is a cyclic number.

It is not a de Polignac number, because 20124361 - 2¹ = 20124359 is a prime.

Together with 20124359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20124331) 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 as a sum of consecutive naturals, namely, 10062180 + 10062181.

It is an arithmetic number, because the mean of its divisors is an integer number (10062181).

Almost surely, 2^20124361 is an apocalyptic number.

It is an amenable number.

20124361 is a deficient number, since it is larger than the sum of its proper divisors (1).

20124361 is an equidigital number, since it uses as much as digits as its factorization.

20124361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20124361 is about 4486.0183905107. The cubic root of 20124361 is about 272.0032123683.

Adding to 20124361 its reverse (16342102), we get a palindrome (36466463).

The spelling of 20124361 in words is "twenty million, one hundred twenty-four thousand, three hundred sixty-one".