2101173686 has 16 divisors (see below), whose sum is σ = 3248413584. Its totient is φ = 1018570464.

The previous prime is 2101173647. The next prime is 2101173689. The reversal of 2101173686 is 6863711012.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101173689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29225 + ... + 71108.

It is an arithmetic number, because the mean of its divisors is an integer number (203025849).

Almost surely, 2^2101173686 is an apocalyptic number.

2101173686 is a deficient number, since it is larger than the sum of its proper divisors (1147239898).

2101173686 is a wasteful number, since it uses less digits than its factorization.

2101173686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100655.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 2101173686 is about 45838.5611248870. The cubic root of 2101173686 is about 1280.8176916410.

Adding to 2101173686 its reverse (6863711012), we get a palindrome (8964884698).

The spelling of 2101173686 in words is "two billion, one hundred one million, one hundred seventy-three thousand, six hundred eighty-six".