2100170023 has 4 divisors (see below), whose sum is σ = 2400194320. Its totient is φ = 1800145728.

The previous prime is 2100169993. The next prime is 2100170027. The reversal of 2100170023 is 3200710012.

It is a happy number.

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 2100170023 - 2¹³ = 2100161831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100169979 and 2100170006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100170027) 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, 150012138 + ... + 150012151.

It is an arithmetic number, because the mean of its divisors is an integer number (600048580).

Almost surely, 2^2100170023 is an apocalyptic number.

2100170023 is a deficient number, since it is larger than the sum of its proper divisors (300024297).

2100170023 is an equidigital number, since it uses as much as digits as its factorization.

2100170023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300024296.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 2100170023 is about 45827.6120150287. The cubic root of 2100170023 is about 1280.6137240408.

Adding to 2100170023 its reverse (3200710012), we get a palindrome (5300880035).

The spelling of 2100170023 in words is "two billion, one hundred million, one hundred seventy thousand, twenty-three".