21032013004 has 24 divisors (see below), whose sum is σ = 38473878240. Its totient is φ = 10041085824.

The previous prime is 21032012977. The next prime is 21032013011. The reversal of 21032013004 is 40031023012.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 148539 + ... + 253234.

It is an arithmetic number, because the mean of its divisors is an integer number (1603078260).

Almost surely, 2^21032013004 is an apocalyptic number.

It is an amenable number.

21032013004 is a deficient number, since it is larger than the sum of its proper divisors (17441865236).

21032013004 is a wasteful number, since it uses less digits than its factorization.

21032013004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402369 (or 402367 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21032013004 its reverse (40031023012), we get a palindrome (61063036016).

The spelling of 21032013004 in words is "twenty-one billion, thirty-two million, thirteen thousand, four".