21114004 has 24 divisors (see below), whose sum is σ = 37739520. Its totient is φ = 10334016.

The previous prime is 21113999. The next prime is 21114011. The reversal of 21114004 is 40041112.

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, 44979 + ... + 45445.

It is an arithmetic number, because the mean of its divisors is an integer number (1572480).

Almost surely, 2^21114004 is an apocalyptic number.

It is an amenable number.

21114004 is a deficient number, since it is larger than the sum of its proper divisors (16625516).

21114004 is a wasteful number, since it uses less digits than its factorization.

21114004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687 (or 685 counting only the distinct ones).

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

The square root of 21114004 is about 4594.9977149069. The cubic root of 21114004 is about 276.3907683296.

Adding to 21114004 its reverse (40041112), we get a palindrome (61155116).

The spelling of 21114004 in words is "twenty-one million, one hundred fourteen thousand, four".