21032045504 has 28 divisors (see below), whose sum is σ = 41889505248. Its totient is φ = 10477209600.

The previous prime is 21032045407. The next prime is 21032045527. The reversal of 21032045504 is 40554023012.

It is a happy number.

It is a super-2 number, since 2×21032045504² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 588977 + ... + 623664.

Almost surely, 2^21032045504 is an apocalyptic number.

It is an amenable number.

21032045504 is a deficient number, since it is larger than the sum of its proper divisors (20857459744).

21032045504 is a wasteful number, since it uses less digits than its factorization.

21032045504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212924 (or 1212914 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 21032045504 its reverse (40554023012), we get a palindrome (61586068516).

The spelling of 21032045504 in words is "twenty-one billion, thirty-two million, forty-five thousand, five hundred four".