21301004 has 12 divisors (see below), whose sum is σ = 37314144. Its totient is φ = 10639824.

The previous prime is 21300997. The next prime is 21301031. The reversal of 21301004 is 40010312.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3302 + ... + 7314.

It is an arithmetic number, because the mean of its divisors is an integer number (3109512).

Almost surely, 2^21301004 is an apocalyptic number.

It is an amenable number.

21301004 is a deficient number, since it is larger than the sum of its proper divisors (16013140).

21301004 is a wasteful number, since it uses less digits than its factorization.

21301004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5344 (or 5342 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 21301004 is about 4615.3010736029. The cubic root of 21301004 is about 277.2043394865.

Adding to 21301004 its reverse (40010312), we get a palindrome (61311316).

The spelling of 21301004 in words is "twenty-one million, three hundred one thousand, four".