21543304303134 has 48 divisors (see below), whose sum is σ = 49423377502512. Its totient is φ = 6758614927104.

The previous prime is 21543304303127. The next prime is 21543304303153. The reversal of 21543304303134 is 43130340334512.

21543304303134 is a `hidden beast` number, since 2 + 1 + 5 + 4 + 3 + 304 + 30 + 313 + 4 = 666.

It is a super-2 number, since 2×21543304303134² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35674852 + ... + 36273704.

It is an arithmetic number, because the mean of its divisors is an integer number (1029653697969).

Almost surely, 2^{21543304303134} is an apocalyptic number.

21543304303134 is an abundant number, since it is smaller than the sum of its proper divisors (27880073199378).

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

21543304303134 is a wasteful number, since it uses less digits than its factorization.

21543304303134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716441 (or 716438 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 36.

Adding to 21543304303134 its reverse (43130340334512), we get a palindrome (64673644637646).

The spelling of 21543304303134 in words is "twenty-one trillion, five hundred forty-three billion, three hundred four million, three hundred three thousand, one hundred thirty-four".