21002431310 has 32 divisors (see below), whose sum is σ = 43210063872. Its totient is φ = 7199989920.

The previous prime is 21002431291. The next prime is 21002431339. The reversal of 21002431310 is 1313420012.

It is a super-2 number, since 2×21002431310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1011089 + ... + 1031651.

It is an arithmetic number, because the mean of its divisors is an integer number (1350314496).

Almost surely, 2^21002431310 is an apocalyptic number.

21002431310 is an abundant number, since it is smaller than the sum of its proper divisors (22207632562).

21002431310 is a wasteful number, since it uses less digits than its factorization.

21002431310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35168.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21002431310 its reverse (1313420012), we get a palindrome (22315851322).

The spelling of 21002431310 in words is "twenty-one billion, two million, four hundred thirty-one thousand, three hundred ten".