4020021067 has 2 divisors, whose sum is σ = 4020021068. Its totient is φ = 4020021066.

The previous prime is 4020021053. The next prime is 4020021079. The reversal of 4020021067 is 7601200204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4020021067 is a prime.

It is not a weakly prime, because it can be changed into another prime (4020021667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010010533 + 2010010534.

It is an arithmetic number, because the mean of its divisors is an integer number (2010010534).

Almost surely, 2^4020021067 is an apocalyptic number.

4020021067 is a deficient number, since it is larger than the sum of its proper divisors (1).

4020021067 is an equidigital number, since it uses as much as digits as its factorization.

4020021067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 4020021067 is about 63403.6360708122. The cubic root of 4020021067 is about 1590.0451007077.

The spelling of 4020021067 in words is "four billion, twenty million, twenty-one thousand, sixty-seven".