21174441004 has 24 divisors (see below), whose sum is σ = 38608109568. Its totient is φ = 10149936720.

The previous prime is 21174440977. The next prime is 21174441017. The reversal of 21174441004 is 40014447112.

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, 784684 + ... + 811219.

It is an arithmetic number, because the mean of its divisors is an integer number (1608671232).

Almost surely, 2^21174441004 is an apocalyptic number.

It is an amenable number.

21174441004 is a deficient number, since it is larger than the sum of its proper divisors (17433668564).

21174441004 is a wasteful number, since it uses less digits than its factorization.

21174441004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596045 (or 1596043 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

Adding to 21174441004 its reverse (40014447112), we get a palindrome (61188888116).

The spelling of 21174441004 in words is "twenty-one billion, one hundred seventy-four million, four hundred forty-one thousand, four".