21082663237 has 8 divisors (see below), whose sum is σ = 22360859136. Its totient is φ = 19808693952.

The previous prime is 21082663219. The next prime is 21082663243. The reversal of 21082663237 is 73236628012.

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

It is a cyclic number.

It is not a de Polignac number, because 21082663237 - 2⁷ = 21082663109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21082663237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21082663837) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1046373 + ... + 1066330.

It is an arithmetic number, because the mean of its divisors is an integer number (2795107392).

Almost surely, 2^21082663237 is an apocalyptic number.

It is an amenable number.

21082663237 is a deficient number, since it is larger than the sum of its proper divisors (1278195899).

21082663237 is a wasteful number, since it uses less digits than its factorization.

21082663237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113307.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 21082663237 in words is "twenty-one billion, eighty-two million, six hundred sixty-three thousand, two hundred thirty-seven".