20043215461 has 2 divisors, whose sum is σ = 20043215462. Its totient is φ = 20043215460.

The previous prime is 20043215459. The next prime is 20043215627. The reversal of 20043215461 is 16451234002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13676133025 + 6367082436 = 116945^2 + 79794^2 .

It is a cyclic number.

It is not a de Polignac number, because 20043215461 - 2¹ = 20043215459 is a prime.

Together with 20043215459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20043210461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10021607730 + 10021607731.

It is an arithmetic number, because the mean of its divisors is an integer number (10021607731).

Almost surely, 2^20043215461 is an apocalyptic number.

It is an amenable number.

20043215461 is a deficient number, since it is larger than the sum of its proper divisors (1).

20043215461 is an equidigital number, since it uses as much as digits as its factorization.

20043215461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 20043215461 its reverse (16451234002), we get a palindrome (36494449463).

The spelling of 20043215461 in words is "twenty billion, forty-three million, two hundred fifteen thousand, four hundred sixty-one".