2102670891 has 96 divisors (see below), whose sum is σ = 3527634240. Its totient is φ = 1198374912.

The previous prime is 2102670881. The next prime is 2102670907. The reversal of 2102670891 is 1980762012.

It is not a de Polignac number, because 2102670891 - 2¹⁴ = 2102654507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2102670811) 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 95 ways as a sum of consecutive naturals, for example, 12154081 + ... + 12154253.

It is an arithmetic number, because the mean of its divisors is an integer number (36746190).

Almost surely, 2^2102670891 is an apocalyptic number.

2102670891 is a deficient number, since it is larger than the sum of its proper divisors (1424963349).

2102670891 is a wasteful number, since it uses less digits than its factorization.

2102670891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365 (or 362 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 2102670891 is about 45854.8894993762. The cubic root of 2102670891 is about 1281.1218377424.

The spelling of 2102670891 in words is "two billion, one hundred two million, six hundred seventy thousand, eight hundred ninety-one".