21404332210 has 16 divisors (see below), whose sum is σ = 38587358016. Its totient is φ = 8548497328.

The previous prime is 21404332153. The next prime is 21404332217. The reversal of 21404332210 is 1223340412.

It is not an unprimeable number, because it can be changed into a prime (21404332217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1647652 + ... + 1660591.

It is an arithmetic number, because the mean of its divisors is an integer number (2411709876).

Almost surely, 2^21404332210 is an apocalyptic number.

21404332210 is a deficient number, since it is larger than the sum of its proper divisors (17183025806).

21404332210 is a wasteful number, since it uses less digits than its factorization.

21404332210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3308897.

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

Adding to 21404332210 its reverse (1223340412), we get a palindrome (22627672622).

The spelling of 21404332210 in words is "twenty-one billion, four hundred four million, three hundred thirty-two thousand, two hundred ten".