21103606715 has 8 divisors (see below), whose sum is σ = 25941994848. Its totient is φ = 16471107520.

The previous prime is 21103606697. The next prime is 21103606721. The reversal of 21103606715 is 51760630112.

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

It is not a de Polignac number, because 21103606715 - 2⁶ = 21103606651 is a prime.

It is a Duffinian number.

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, 51472007 + ... + 51472416.

It is an arithmetic number, because the mean of its divisors is an integer number (3242749356).

Almost surely, 2^21103606715 is an apocalyptic number.

21103606715 is a deficient number, since it is larger than the sum of its proper divisors (4838388133).

21103606715 is a wasteful number, since it uses less digits than its factorization.

21103606715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102944469.

The product of its (nonzero) digits is 7560, while the sum is 32.

The spelling of 21103606715 in words is "twenty-one billion, one hundred three million, six hundred six thousand, seven hundred fifteen".