21320002310 has 32 divisors (see below), whose sum is σ = 39813120000. Its totient is φ = 8211408480.

The previous prime is 21320002307. The next prime is 21320002321. The reversal of 21320002310 is 1320002312.

It is a happy number.

It is a super-2 number, since 2×21320002310² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

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, 111110 + ... + 234489.

It is an arithmetic number, because the mean of its divisors is an integer number (1244160000).

Almost surely, 2^21320002310 is an apocalyptic number.

21320002310 is a deficient number, since it is larger than the sum of its proper divisors (18493117690).

21320002310 is a wasteful number, since it uses less digits than its factorization.

21320002310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345836.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21320002310 its reverse (1320002312), we get a palindrome (22640004622).

The spelling of 21320002310 in words is "twenty-one billion, three hundred twenty million, two thousand, three hundred ten".