21411004 has 24 divisors (see below), whose sum is σ = 38223920. Its totient is φ = 10492416.

The previous prime is 21410981. The next prime is 21411011. The reversal of 21411004 is 40011412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53734 + ... + 54130.

Almost surely, 2^21411004 is an apocalyptic number.

It is an amenable number.

21411004 is a deficient number, since it is larger than the sum of its proper divisors (16812916).

21411004 is a wasteful number, since it uses less digits than its factorization.

21411004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 21411004 is about 4627.2026106493. The cubic root of 21411004 is about 277.6806885344.

Adding to 21411004 its reverse (40011412), we get a palindrome (61422416).

The spelling of 21411004 in words is "twenty-one million, four hundred eleven thousand, four".