21214036604615 has 8 divisors (see below), whose sum is σ = 25719285616080. Its totient is φ = 16796268156672.

The previous prime is 21214036604611. The next prime is 21214036604627. The reversal of 21214036604615 is 51640663041212.

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 21214036604615 - 2² = 21214036604611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214036604611) 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, 21870140345 + ... + 21870141314.

It is an arithmetic number, because the mean of its divisors is an integer number (3214910702010).

Almost surely, 2^{21214036604615} is an apocalyptic number.

21214036604615 is a deficient number, since it is larger than the sum of its proper divisors (4505249011465).

21214036604615 is an equidigital number, since it uses as much as digits as its factorization.

21214036604615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43740281761.

The product of its (nonzero) digits is 207360, while the sum is 41.

Adding to 21214036604615 its reverse (51640663041212), we get a palindrome (72854699645827).

The spelling of 21214036604615 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, six hundred four thousand, six hundred fifteen".