211170805893 has 8 divisors (see below), whose sum is σ = 312845638400. Its totient is φ = 140780537244.

The previous prime is 211170805889. The next prime is 211170805903. The reversal of 211170805893 is 398508071112.

It is not a de Polignac number, because 211170805893 - 2² = 211170805889 is a prime.

It is a super-2 number, since 2×211170805893² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211170809893) 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, 3910570453 + ... + 3910570506.

It is an arithmetic number, because the mean of its divisors is an integer number (39105704800).

Almost surely, 2^211170805893 is an apocalyptic number.

It is an amenable number.

211170805893 is a deficient number, since it is larger than the sum of its proper divisors (101674832507).

211170805893 is an equidigital number, since it uses as much as digits as its factorization.

211170805893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7821140968 (or 7821140962 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The spelling of 211170805893 in words is "two hundred eleven billion, one hundred seventy million, eight hundred five thousand, eight hundred ninety-three".