21703214004 has 12 divisors (see below), whose sum is σ = 50640832704. Its totient is φ = 7234404664.

The previous prime is 21703213969. The next prime is 21703214047. The reversal of 21703214004 is 40041230712.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 904300572 + ... + 904300595.

It is an arithmetic number, because the mean of its divisors is an integer number (4220069392).

Almost surely, 2^21703214004 is an apocalyptic number.

It is an amenable number.

21703214004 is an abundant number, since it is smaller than the sum of its proper divisors (28937618700).

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

21703214004 is a wasteful number, since it uses less digits than its factorization.

21703214004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808601174 (or 1808601172 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

Adding to 21703214004 its reverse (40041230712), we get a palindrome (61744444716).

The spelling of 21703214004 in words is "twenty-one billion, seven hundred three million, two hundred fourteen thousand, four".