21339310 has 16 divisors (see below), whose sum is σ = 38505456. Its totient is φ = 8514688.

The previous prime is 21339293. The next prime is 21339313. The reversal of 21339310 is 1393312.

It is a super-2 number, since 2×21339310² = 910732302552200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21339313) 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, 2022 + ... + 6838.

It is an arithmetic number, because the mean of its divisors is an integer number (2406591).

Almost surely, 2^21339310 is an apocalyptic number.

21339310 is a deficient number, since it is larger than the sum of its proper divisors (17166146).

21339310 is a wasteful number, since it uses less digits than its factorization.

21339310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5267.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 21339310 is about 4619.4491013540. The cubic root of 21339310 is about 277.3704072546.

The spelling of 21339310 in words is "twenty-one million, three hundred thirty-nine thousand, three hundred ten".