21199443004 has 24 divisors (see below), whose sum is σ = 38385416160. Its totient is φ = 10232316864.

The previous prime is 21199442993. The next prime is 21199443047. The reversal of 21199443004 is 40034499112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 767457 + ... + 794599.

It is an arithmetic number, because the mean of its divisors is an integer number (1599392340).

Almost surely, 2^21199443004 is an apocalyptic number.

It is an amenable number.

21199443004 is a deficient number, since it is larger than the sum of its proper divisors (17185973156).

21199443004 is a wasteful number, since it uses less digits than its factorization.

21199443004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33909 (or 33907 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 21199443004 in words is "twenty-one billion, one hundred ninety-nine million, four hundred forty-three thousand, four".