21310539948028 has 48 divisors (see below), whose sum is σ = 37711819452384. Its totient is φ = 10535937085440.

The previous prime is 21310539948011. The next prime is 21310539948029. The reversal of 21310539948028 is 82084993501312.

It is a super-2 number, since 2×21310539948028² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21310539948028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310539948029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2962674000 + ... + 2962681192.

It is an arithmetic number, because the mean of its divisors is an integer number (785662905258).

Almost surely, 2^{21310539948028} is an apocalyptic number.

It is an amenable number.

21310539948028 is a deficient number, since it is larger than the sum of its proper divisors (16401279504356).

21310539948028 is a wasteful number, since it uses less digits than its factorization.

21310539948028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13102 (or 13100 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 55.

The spelling of 21310539948028 in words is "twenty-one trillion, three hundred ten billion, five hundred thirty-nine million, nine hundred forty-eight thousand, twenty-eight".