21411021004 has 6 divisors (see below), whose sum is σ = 37469286764. Its totient is φ = 10705510500.

The previous prime is 21411020977. The next prime is 21411021013. The reversal of 21411021004 is 40012011412.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2676377622 + ... + 2676377629.

Almost surely, 2^21411021004 is an apocalyptic number.

It is an amenable number.

21411021004 is a deficient number, since it is larger than the sum of its proper divisors (16058265760).

21411021004 is a wasteful number, since it uses less digits than its factorization.

21411021004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5352755255 (or 5352755253 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21411021004 its reverse (40012011412), we get a palindrome (61423032416).

The spelling of 21411021004 in words is "twenty-one billion, four hundred eleven million, twenty-one thousand, four".