21843500534812 has 24 divisors (see below), whose sum is σ = 41729347924992. Its totient is φ = 9922168729200.

The previous prime is 21843500534773. The next prime is 21843500534819.

21843500534812 is nontrivially palindromic in base 10.

21843500534812 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 2×21843500534812² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21843500534819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167312764 + ... + 167443267.

It is an arithmetic number, because the mean of its divisors is an integer number (1738722830208).

Almost surely, 2^{21843500534812} is an apocalyptic number.

21843500534812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21843500534812 is a deficient number, since it is larger than the sum of its proper divisors (19885847390180).

21843500534812 is a wasteful number, since it uses less digits than its factorization.

21843500534812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334757529 (or 334757527 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 46.

The spelling of 21843500534812 in words is "twenty-one trillion, eight hundred forty-three billion, five hundred million, five hundred thirty-four thousand, eight hundred twelve".