20616717365 has 8 divisors (see below), whose sum is σ = 25343477208. Its totient is φ = 16091096320.

The previous prime is 20616717311. The next prime is 20616717383. The reversal of 20616717365 is 56371761602.

It can be written as a sum of positive squares in 4 ways, for example, as 490755409 + 20125961956 = 22153^2 + 141866^2 .

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

It is not a de Polignac number, because 20616717365 - 2¹⁴ = 20616700981 is a prime.

It is a Duffinian number.

It is a congruent 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, 50284472 + ... + 50284881.

It is an arithmetic number, because the mean of its divisors is an integer number (3167934651).

Almost surely, 2^20616717365 is an apocalyptic number.

It is an amenable number.

20616717365 is a deficient number, since it is larger than the sum of its proper divisors (4726759843).

20616717365 is a wasteful number, since it uses less digits than its factorization.

20616717365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100569399.

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 20616717365 in words is "twenty billion, six hundred sixteen million, seven hundred seventeen thousand, three hundred sixty-five".