21155002546344 has 64 divisors (see below), whose sum is σ = 52939138756800. Its totient is φ = 7044784344576.

The previous prime is 21155002546343. The next prime is 21155002546427. The reversal of 21155002546344 is 44364520055112.

21155002546344 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×21155002546344² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21155002546296 and 21155002546305.

It is not an unprimeable number, because it can be changed into a prime (21155002546343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371809962 + ... + 371866854.

It is an arithmetic number, because the mean of its divisors is an integer number (827174043075).

Almost surely, 2^{21155002546344} is an apocalyptic number.

21155002546344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21155002546344 is an abundant number, since it is smaller than the sum of its proper divisors (31784136210456).

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

21155002546344 is a wasteful number, since it uses less digits than its factorization.

21155002546344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71754 (or 71750 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 42.

The spelling of 21155002546344 in words is "twenty-one trillion, one hundred fifty-five billion, two million, five hundred forty-six thousand, three hundred forty-four".