4020543321 has 8 divisors (see below), whose sum is σ = 5505609024. Its totient is φ = 2607919920.

The previous prime is 4020543281. The next prime is 4020543349. The reversal of 4020543321 is 1233450204.

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

It is not a de Polignac number, because 4020543321 - 2⁶ = 4020543257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4020543291 and 4020543300.

It is not an unprimeable number, because it can be changed into a prime (4020543391) 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, 18110445 + ... + 18110666.

It is an arithmetic number, because the mean of its divisors is an integer number (688201128).

Almost surely, 2^4020543321 is an apocalyptic number.

It is an amenable number.

4020543321 is a deficient number, since it is larger than the sum of its proper divisors (1485065703).

4020543321 is a wasteful number, since it uses less digits than its factorization.

4020543321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36221151.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 4020543321 is about 63407.7544232565. The cubic root of 4020543321 is about 1590.1139537015.

Adding to 4020543321 its reverse (1233450204), we get a palindrome (5253993525).

The spelling of 4020543321 in words is "four billion, twenty million, five hundred forty-three thousand, three hundred twenty-one".