2106931761 has 12 divisors (see below), whose sum is σ = 3320013840. Its totient is φ = 1276928280.

The previous prime is 2106931733. The next prime is 2106931769. The reversal of 2106931761 is 1671396012.

It is not a de Polignac number, because 2106931761 - 2⁷ = 2106931633 is a prime.

It is a super-2 number, since 2×2106931761² = 8878322891021122242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2106931769) 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 11 ways as a sum of consecutive naturals, for example, 10640971 + ... + 10641168.

It is an arithmetic number, because the mean of its divisors is an integer number (276667820).

Almost surely, 2^2106931761 is an apocalyptic number.

It is an amenable number.

2106931761 is a deficient number, since it is larger than the sum of its proper divisors (1213082079).

2106931761 is a wasteful number, since it uses less digits than its factorization.

2106931761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21282156 (or 21282153 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 2106931761 is about 45901.3263533855. The cubic root of 2106931761 is about 1281.9866125696.

The spelling of 2106931761 in words is "two billion, one hundred six million, nine hundred thirty-one thousand, seven hundred sixty-one".