20552102617 has 16 divisors (see below), whose sum is σ = 21633056640. Its totient is φ = 19487521152.

The previous prime is 20552102611. The next prime is 20552102777. The reversal of 20552102617 is 71620125502.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20552102617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20552102611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1218838 + ... + 1235584.

It is an arithmetic number, because the mean of its divisors is an integer number (1352066040).

Almost surely, 2^20552102617 is an apocalyptic number.

It is an amenable number.

20552102617 is a deficient number, since it is larger than the sum of its proper divisors (1080954023).

20552102617 is a wasteful number, since it uses less digits than its factorization.

20552102617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17232.

The product of its (nonzero) digits is 8400, while the sum is 31.

The spelling of 20552102617 in words is "twenty billion, five hundred fifty-two million, one hundred two thousand, six hundred seventeen".