21005106483 has 8 divisors (see below), whose sum is σ = 29654268048. Its totient is φ = 13179674624.

The previous prime is 21005106407. The next prime is 21005106533. The reversal of 21005106483 is 38460150012.

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 21005106483 - 2²⁴ = 20988329267 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21005106483.

It is not an unprimeable number, because it can be changed into a prime (21005106403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205932366 + ... + 205932467.

It is an arithmetic number, because the mean of its divisors is an integer number (3706783506).

Almost surely, 2^21005106483 is an apocalyptic number.

21005106483 is a deficient number, since it is larger than the sum of its proper divisors (8649161565).

21005106483 is a wasteful number, since it uses less digits than its factorization.

21005106483 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411864853.

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 21005106483 its reverse (38460150012), we get a palindrome (59465256495).

The spelling of 21005106483 in words is "twenty-one billion, five million, one hundred six thousand, four hundred eighty-three".