4020021323 has 2 divisors, whose sum is σ = 4020021324. Its totient is φ = 4020021322.

The previous prime is 4020021319. The next prime is 4020021353. The reversal of 4020021323 is 3231200204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4020021323 - 2² = 4020021319 is a prime.

It is not a weakly prime, because it can be changed into another prime (4020021353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010010661 + 2010010662.

It is an arithmetic number, because the mean of its divisors is an integer number (2010010662).

Almost surely, 2^4020021323 is an apocalyptic number.

4020021323 is a deficient number, since it is larger than the sum of its proper divisors (1).

4020021323 is an equidigital number, since it uses as much as digits as its factorization.

4020021323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 4020021323 is about 63403.6380896238. The cubic root of 4020021323 is about 1590.0451344597.

Adding to 4020021323 its reverse (3231200204), we get a palindrome (7251221527).

The spelling of 4020021323 in words is "four billion, twenty million, twenty-one thousand, three hundred twenty-three".