21003343210 has 8 divisors (see below), whose sum is σ = 37806017796. Its totient is φ = 8401337280.

The previous prime is 21003343181. The next prime is 21003343217. The reversal of 21003343210 is 1234330012.

It can be written as a sum of positive squares in 2 ways, for example, as 20886897529 + 116445681 = 144523^2 + 10791^2 .

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

It is a super-2 number, since 2×21003343210² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21003343217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050167151 + ... + 1050167170.

Almost surely, 2^21003343210 is an apocalyptic number.

21003343210 is a deficient number, since it is larger than the sum of its proper divisors (16802674586).

21003343210 is a wasteful number, since it uses less digits than its factorization.

21003343210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100334328.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21003343210 its reverse (1234330012), we get a palindrome (22237673222).

The spelling of 21003343210 in words is "twenty-one billion, three million, three hundred forty-three thousand, two hundred ten".