23621475281 has 2 divisors, whose sum is σ = 23621475282. Its totient is φ = 23621475280.

The previous prime is 23621475253. The next prime is 23621475313. The reversal of 23621475281 is 18257412632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23289506881 + 331968400 = 152609^2 + 18220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23621475281 is a prime.

It is a super-2 number, since 2×23621475281² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23621475481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11810737640 + 11810737641.

It is an arithmetic number, because the mean of its divisors is an integer number (11810737641).

Almost surely, 2^23621475281 is an apocalyptic number.

It is an amenable number.

23621475281 is a deficient number, since it is larger than the sum of its proper divisors (1).

23621475281 is an equidigital number, since it uses as much as digits as its factorization.

23621475281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 41.

The spelling of 23621475281 in words is "twenty-three billion, six hundred twenty-one million, four hundred seventy-five thousand, two hundred eighty-one".