20136261707 has 4 divisors (see below), whose sum is σ = 20138095536. Its totient is φ = 20134427880.

The previous prime is 20136261667. The next prime is 20136261713. The reversal of 20136261707 is 70716263102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70716263102 = 2 ⋅35358131551.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20136261707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20136261757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 900344 + ... + 922437.

It is an arithmetic number, because the mean of its divisors is an integer number (5034523884).

Almost surely, 2^20136261707 is an apocalyptic number.

20136261707 is a deficient number, since it is larger than the sum of its proper divisors (1833829).

20136261707 is a wasteful number, since it uses less digits than its factorization.

20136261707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833828.

The product of its (nonzero) digits is 21168, while the sum is 35.

The spelling of 20136261707 in words is "twenty billion, one hundred thirty-six million, two hundred sixty-one thousand, seven hundred seven".