2104642081 has 4 divisors (see below), whose sum is σ = 2131283200. Its totient is φ = 2078000964.

The previous prime is 2104642061. The next prime is 2104642091. The reversal of 2104642081 is 1802464012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2104642081 - 2⁷ = 2104641953 is a prime.

It is a super-2 number, since 2×2104642081² = 8859036578232021122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2104642051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13320441 + ... + 13320598.

It is an arithmetic number, because the mean of its divisors is an integer number (532820800).

Almost surely, 2^2104642081 is an apocalyptic number.

It is an amenable number.

2104642081 is a deficient number, since it is larger than the sum of its proper divisors (26641119).

2104642081 is an equidigital number, since it uses as much as digits as its factorization.

2104642081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26641118.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 2104642081 is about 45876.3782463263. The cubic root of 2104642081 is about 1281.5220502904.

The spelling of 2104642081 in words is "two billion, one hundred four million, six hundred forty-two thousand, eighty-one".