21344000310 has 64 divisors (see below), whose sum is σ = 60265425600. Its totient is φ = 5356924416.

The previous prime is 21344000287. The next prime is 21344000369. The reversal of 21344000310 is 1300044312.

21344000310 is a `hidden beast` number, since 213 + 440 + 0 + 0 + 3 + 10 = 666.

It is a super-2 number, since 2×21344000310² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2320465 + ... + 2329644.

It is an arithmetic number, because the mean of its divisors is an integer number (941647275).

Almost surely, 2^21344000310 is an apocalyptic number.

21344000310 is an abundant number, since it is smaller than the sum of its proper divisors (38921425290).

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

21344000310 is a wasteful number, since it uses less digits than its factorization.

21344000310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4650142 (or 4650136 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21344000310 its reverse (1300044312), we get a palindrome (22644044622).

The spelling of 21344000310 in words is "twenty-one billion, three hundred forty-four million, three hundred ten", and thus it is an aban number.