21345002 has 16 divisors (see below), whose sum is σ = 36936000. Its totient is φ = 9061728.

The previous prime is 21345001. The next prime is 21345007. The reversal of 21345002 is 20054312.

It is a super-2 number, since 2×21345002² = 911218220760008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21345001) 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 7 ways as a sum of consecutive naturals, for example, 5627 + ... + 8622.

It is an arithmetic number, because the mean of its divisors is an integer number (2308500).

Almost surely, 2^21345002 is an apocalyptic number.

21345002 is a deficient number, since it is larger than the sum of its proper divisors (15590998).

21345002 is a wasteful number, since it uses less digits than its factorization.

21345002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14365.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 21345002 is about 4620.0651510558. The cubic root of 21345002 is about 277.3950667836.

Adding to 21345002 its reverse (20054312), we get a palindrome (41399314).

The spelling of 21345002 in words is "twenty-one million, three hundred forty-five thousand, two".