21040032310 has 32 divisors (see below), whose sum is σ = 41475786912. Its totient is φ = 7621140480.

The previous prime is 21040032287. The next prime is 21040032313. The reversal of 21040032310 is 1323004012.

It is a happy number.

It is a super-2 number, since 2×21040032310² (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 (21040032313) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 343857 + ... + 400396.

It is an arithmetic number, because the mean of its divisors is an integer number (1296118341).

Almost surely, 2^21040032310 is an apocalyptic number.

21040032310 is a deficient number, since it is larger than the sum of its proper divisors (20435754602).

21040032310 is a wasteful number, since it uses less digits than its factorization.

21040032310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744528.

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

Adding to 21040032310 its reverse (1323004012), we get a palindrome (22363036322).

The spelling of 21040032310 in words is "twenty-one billion, forty million, thirty-two thousand, three hundred ten".