21416617707 has 8 divisors (see below), whose sum is σ = 28567952784. Its totient is φ = 14271513888.

The previous prime is 21416617643. The next prime is 21416617727. The reversal of 21416617707 is 70771661412.

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

It is not a de Polignac number, because 21416617707 - 2⁶ = 21416617643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21416617727) 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, 1549788 + ... + 1563545.

It is an arithmetic number, because the mean of its divisors is an integer number (3570994098).

Almost surely, 2^21416617707 is an apocalyptic number.

21416617707 is a deficient number, since it is larger than the sum of its proper divisors (7151335077).

21416617707 is a wasteful number, since it uses less digits than its factorization.

21416617707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3115629.

The product of its (nonzero) digits is 98784, while the sum is 42.

The spelling of 21416617707 in words is "twenty-one billion, four hundred sixteen million, six hundred seventeen thousand, seven hundred seven".