20136616601 has 4 divisors (see below), whose sum is σ = 20137685604. Its totient is φ = 20135547600.

The previous prime is 20136616589. The next prime is 20136616663. The reversal of 20136616601 is 10661663102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10661663102 = 2 ⋅5330831551.

It can be written as a sum of positive squares in 2 ways, for example, as 12426898576 + 7709718025 = 111476^2 + 87805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20136616601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20136606601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505730 + ... + 544091.

It is an arithmetic number, because the mean of its divisors is an integer number (5034421401).

Almost surely, 2^20136616601 is an apocalyptic number.

It is an amenable number.

20136616601 is a deficient number, since it is larger than the sum of its proper divisors (1069003).

20136616601 is a wasteful number, since it uses less digits than its factorization.

20136616601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069002.

The product of its (nonzero) digits is 7776, while the sum is 32.

The spelling of 20136616601 in words is "twenty billion, one hundred thirty-six million, six hundred sixteen thousand, six hundred one".