4022738021 has 6 divisors (see below), whose sum is σ = 4118467590. Its totient is φ = 3929184168.

The previous prime is 4022738017. The next prime is 4022738023. The reversal of 4022738021 is 1208372204.

It can be written as a sum of positive squares in only one way, i.e., 4022730625 + 7396 = 63425^2 + 86^2 .

It is not a de Polignac number, because 4022738021 - 2² = 4022738017 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 (4022738023) 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, 1085966 + ... + 1089663.

It is an arithmetic number, because the mean of its divisors is an integer number (686411265).

Almost surely, 2^4022738021 is an apocalyptic number.

It is an amenable number.

4022738021 is a deficient number, since it is larger than the sum of its proper divisors (95729569).

4022738021 is an equidigital number, since it uses as much as digits as its factorization.

4022738021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175715 (or 2175672 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 4022738021 is about 63425.0583050579. The cubic root of 4022738021 is about 1590.4032336992.

The spelling of 4022738021 in words is "four billion, twenty-two million, seven hundred thirty-eight thousand, twenty-one".