4020939911 has 4 divisors (see below), whose sum is σ = 4106491872. Its totient is φ = 3935387952.

The previous prime is 4020939893. The next prime is 4020939953. The reversal of 4020939911 is 1199390204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4020939911 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 (4020939991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42775910 + ... + 42776003.

It is an arithmetic number, because the mean of its divisors is an integer number (1026622968).

Almost surely, 2^4020939911 is an apocalyptic number.

4020939911 is a deficient number, since it is larger than the sum of its proper divisors (85551961).

4020939911 is an equidigital number, since it uses as much as digits as its factorization.

4020939911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85551960.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 4020939911 is about 63410.8816450300. The cubic root of 4020939911 is about 1590.1662354047.

The spelling of 4020939911 in words is "four billion, twenty million, nine hundred thirty-nine thousand, nine hundred eleven".