21313002 has 32 divisors (see below), whose sum is σ = 45384192. Its totient is φ = 6649344.

The previous prime is 21313001. The next prime is 21313021. The reversal of 21313002 is 20031312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21313001) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 22278 + ... + 23214.

It is an arithmetic number, because the mean of its divisors is an integer number (1418256).

Almost surely, 2^21313002 is an apocalyptic number.

21313002 is an abundant number, since it is smaller than the sum of its proper divisors (24071190).

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

21313002 is a wasteful number, since it uses less digits than its factorization.

21313002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 21313002 is about 4616.6006974829. The cubic root of 21313002 is about 277.2563757412.

Adding to 21313002 its reverse (20031312), we get a palindrome (41344314).

The spelling of 21313002 in words is "twenty-one million, three hundred thirteen thousand, two".