21682313566534 has 8 divisors (see below), whose sum is σ = 32524003259208. Its totient is φ = 10840979146800.

The previous prime is 21682313566531. The next prime is 21682313566561. The reversal of 21682313566534 is 43566531328612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21682313566531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88665607 + ... + 88909810.

It is an arithmetic number, because the mean of its divisors is an integer number (4065500407401).

Almost surely, 2^{21682313566534} is an apocalyptic number.

21682313566534 is a deficient number, since it is larger than the sum of its proper divisors (10841689692674).

21682313566534 is a wasteful number, since it uses less digits than its factorization.

21682313566534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177636470.

The product of its digits is 18662400, while the sum is 55.

The spelling of 21682313566534 in words is "twenty-one trillion, six hundred eighty-two billion, three hundred thirteen million, five hundred sixty-six thousand, five hundred thirty-four".