21240030310 has 32 divisors (see below), whose sum is σ = 38657217600. Its totient is φ = 8401870848.

The previous prime is 21240030283. The next prime is 21240030319. The reversal of 21240030310 is 1303004212.

It is a happy number.

It is a super-2 number, since 2×21240030310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21240030319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 486439 + ... + 528301.

It is an arithmetic number, because the mean of its divisors is an integer number (1208038050).

Almost surely, 2^21240030310 is an apocalyptic number.

21240030310 is a deficient number, since it is larger than the sum of its proper divisors (17417187290).

21240030310 is a wasteful number, since it uses less digits than its factorization.

21240030310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42432.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21240030310 its reverse (1303004212), we get a palindrome (22543034522).

The spelling of 21240030310 in words is "twenty-one billion, two hundred forty million, thirty thousand, three hundred ten".