21404320210 has 64 divisors (see below), whose sum is σ = 47472913152. Its totient is φ = 6766384896.

The previous prime is 21404320207. The next prime is 21404320279. The reversal of 21404320210 is 1202340412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 812404 + ... + 838336.

It is an arithmetic number, because the mean of its divisors is an integer number (741764268).

Almost surely, 2^21404320210 is an apocalyptic number.

21404320210 is an abundant number, since it is smaller than the sum of its proper divisors (26068592942).

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

21404320210 is a wasteful number, since it uses less digits than its factorization.

21404320210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26867.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21404320210 its reverse (1202340412), we get a palindrome (22606660622).

The spelling of 21404320210 in words is "twenty-one billion, four hundred four million, three hundred twenty thousand, two hundred ten".