20223607242521 has 2 divisors, whose sum is σ = 20223607242522. Its totient is φ = 20223607242520.

The previous prime is 20223607242491. The next prime is 20223607242563. The reversal of 20223607242521 is 12524270632202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13238100096400 + 6985507146121 = 3638420^2 + 2643011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20223607242521 is a prime.

It is not a weakly prime, because it can be changed into another prime (20223607242121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10111803621260 + 10111803621261.

It is an arithmetic number, because the mean of its divisors is an integer number (10111803621261).

Almost surely, 2^{20223607242521} is an apocalyptic number.

It is an amenable number.

20223607242521 is a deficient number, since it is larger than the sum of its proper divisors (1).

20223607242521 is an equidigital number, since it uses as much as digits as its factorization.

20223607242521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 38.

Adding to 20223607242521 its reverse (12524270632202), we get a palindrome (32747877874723).

The spelling of 20223607242521 in words is "twenty trillion, two hundred twenty-three billion, six hundred seven million, two hundred forty-two thousand, five hundred twenty-one".