21304002 has 8 divisors (see below), whose sum is σ = 42608016. Its totient is φ = 7101332.

The previous prime is 21304001. The next prime is 21304027. The reversal of 21304002 is 20040312.

It is a sphenic number, since it is the product of 3 distinct primes.

21304002 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21304001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1775328 + ... + 1775339.

It is an arithmetic number, because the mean of its divisors is an integer number (5326002).

Almost surely, 2^21304002 is an apocalyptic number.

21304002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21304002 is a wasteful number, since it uses less digits than its factorization.

21304002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3550672.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 21304002 is about 4615.6258513879. The cubic root of 21304002 is about 277.2173438754.

Adding to 21304002 its reverse (20040312), we get a palindrome (41344314).

The spelling of 21304002 in words is "twenty-one million, three hundred four thousand, two".