21220343410 has 32 divisors (see below), whose sum is σ = 44085503232. Its totient is φ = 7203508800.

The previous prime is 21220343377. The next prime is 21220343429. The reversal of 21220343410 is 1434302212.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1493662 + ... + 1507801.

It is an arithmetic number, because the mean of its divisors is an integer number (1377671976).

Almost surely, 2^21220343410 is an apocalyptic number.

21220343410 is an abundant number, since it is smaller than the sum of its proper divisors (22865159822).

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

21220343410 is a wasteful number, since it uses less digits than its factorization.

21220343410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001578.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21220343410 its reverse (1434302212), we get a palindrome (22654645622).

The spelling of 21220343410 in words is "twenty-one billion, two hundred twenty million, three hundred forty-three thousand, four hundred ten".