20036868685187 has 4 divisors (see below), whose sum is σ = 20037010431000. Its totient is φ = 20036726939376.

The previous prime is 20036868685181. The next prime is 20036868685201. The reversal of 20036868685187 is 78158686863002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20036868685187 - 2¹⁰ = 20036868684163 is a prime.

It is a super-2 number, since 2×20036868685187² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20036868685181) 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, 70660658 + ... + 70943655.

It is an arithmetic number, because the mean of its divisors is an integer number (5009252607750).

Almost surely, 2^{20036868685187} is an apocalyptic number.

20036868685187 is a deficient number, since it is larger than the sum of its proper divisors (141745813).

20036868685187 is a wasteful number, since it uses less digits than its factorization.

20036868685187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141745812.

The product of its (nonzero) digits is 185794560, while the sum is 68.

The spelling of 20036868685187 in words is "twenty trillion, thirty-six billion, eight hundred sixty-eight million, six hundred eighty-five thousand, one hundred eighty-seven".