21232260573 has 4 divisors (see below), whose sum is σ = 28309680768. Its totient is φ = 14154840380.

The previous prime is 21232260571. The next prime is 21232260649. The reversal of 21232260573 is 37506223212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21232260573 - 2¹ = 21232260571 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232260571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3538710093 + ... + 3538710098.

It is an arithmetic number, because the mean of its divisors is an integer number (7077420192).

Almost surely, 2^21232260573 is an apocalyptic number.

It is an amenable number.

21232260573 is a deficient number, since it is larger than the sum of its proper divisors (7077420195).

21232260573 is an equidigital number, since it uses as much as digits as its factorization.

21232260573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7077420194.

The product of its (nonzero) digits is 30240, while the sum is 33.

Adding to 21232260573 its reverse (37506223212), we get a palindrome (58738483785).

The spelling of 21232260573 in words is "twenty-one billion, two hundred thirty-two million, two hundred sixty thousand, five hundred seventy-three".