21705003115 has 8 divisors (see below), whose sum is σ = 27416846160. Its totient is φ = 16450107552.

The previous prime is 21705003083. The next prime is 21705003149. The reversal of 21705003115 is 51130050712.

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 21705003115 - 2⁵ = 21705003083 is a prime.

It is a super-2 number, since 2×21705003115² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21705003115.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114236764 + ... + 114236953.

It is an arithmetic number, because the mean of its divisors is an integer number (3427105770).

Almost surely, 2^21705003115 is an apocalyptic number.

21705003115 is a deficient number, since it is larger than the sum of its proper divisors (5711843045).

21705003115 is a wasteful number, since it uses less digits than its factorization.

21705003115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228473741.

The product of its (nonzero) digits is 1050, while the sum is 25.

Adding to 21705003115 its reverse (51130050712), we get a palindrome (72835053827).

The spelling of 21705003115 in words is "twenty-one billion, seven hundred five million, three thousand, one hundred fifteen".