2081164021 has 8 divisors (see below), whose sum is σ = 2207024064. Its totient is φ = 1955686080.

The previous prime is 2081163991. The next prime is 2081164027. The reversal of 2081164021 is 1204611802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2081164021 - 2⁵ = 2081163989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081164027) 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, 84265 + ... + 106126.

It is an arithmetic number, because the mean of its divisors is an integer number (275878008).

Almost surely, 2^2081164021 is an apocalyptic number.

It is an amenable number.

2081164021 is a deficient number, since it is larger than the sum of its proper divisors (125860043).

2081164021 is a wasteful number, since it uses less digits than its factorization.

2081164021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191051.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 2081164021 is about 45619.7766434690. The cubic root of 2081164021 is about 1276.7389361687.

Adding to 2081164021 its reverse (1204611802), we get a palindrome (3285775823).

The spelling of 2081164021 in words is "two billion, eighty-one million, one hundred sixty-four thousand, twenty-one".