21233052404 has 24 divisors (see below), whose sum is σ = 37407384168. Its totient is φ = 10545275520.

The previous prime is 21233052383. The next prime is 21233052457. The reversal of 21233052404 is 40425033212.

It can be written as a sum of positive squares in 4 ways, for example, as 338928100 + 20894124304 = 18410^2 + 144548^2 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3547094 + ... + 3553074.

It is an arithmetic number, because the mean of its divisors is an integer number (1558641007).

Almost surely, 2^21233052404 is an apocalyptic number.

It is an amenable number.

21233052404 is a deficient number, since it is larger than the sum of its proper divisors (16174331764).

21233052404 is a wasteful number, since it uses less digits than its factorization.

21233052404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11795 (or 11793 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 21233052404 its reverse (40425033212), we get a palindrome (61658085616).

The spelling of 21233052404 in words is "twenty-one billion, two hundred thirty-three million, fifty-two thousand, four hundred four".