20648339716 has 12 divisors (see below), whose sum is σ = 36263189340. Its totient is φ = 10287428480.

The previous prime is 20648339683. The next prime is 20648339729. The reversal of 20648339716 is 61793384602.

It can be written as a sum of positive squares in 2 ways, for example, as 11782234116 + 8866105600 = 108546^2 + 94160^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20648339716.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9184081 + ... + 9186328.

It is an arithmetic number, because the mean of its divisors is an integer number (3021932445).

Almost surely, 2^20648339716 is an apocalyptic number.

It is an amenable number.

20648339716 is a deficient number, since it is larger than the sum of its proper divisors (15614849624).

20648339716 is a wasteful number, since it uses less digits than its factorization.

20648339716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18370694 (or 18370692 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 49.

The spelling of 20648339716 in words is "twenty billion, six hundred forty-eight million, three hundred thirty-nine thousand, seven hundred sixteen".