4081632021 has 6 divisors (see below), whose sum is σ = 5895690710. Its totient is φ = 2721088008.

The previous prime is 4081632011. The next prime is 4081632029. The reversal of 4081632021 is 1202361804.

4081632021 is a `hidden beast` number, since 4 + 0 + 8 + 1 + 632 + 0 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2993621796 + 1088010225 = 54714^2 + 32985^2 .

It is not a de Polignac number, because 4081632021 - 2²² = 4077437717 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 (4081632029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 226757326 + ... + 226757343.

Almost surely, 2^4081632021 is an apocalyptic number.

It is an amenable number.

4081632021 is a deficient number, since it is larger than the sum of its proper divisors (1814058689).

4081632021 is a wasteful number, since it uses less digits than its factorization.

4081632021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453514675 (or 453514672 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 4081632021 is about 63887.6515533323. The cubic root of 4081632021 is about 1598.1269776236.

Adding to 4081632021 its reverse (1202361804), we get a palindrome (5283993825).

The spelling of 4081632021 in words is "four billion, eighty-one million, six hundred thirty-two thousand, twenty-one".