4030023021 has 4 divisors (see below), whose sum is σ = 5373364032. Its totient is φ = 2686682012.

The previous prime is 4030023001. The next prime is 4030023031. The reversal of 4030023021 is 1203200304.

4030023021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4030023021 - 2⁵ = 4030022989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4030023001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671670501 + ... + 671670506.

It is an arithmetic number, because the mean of its divisors is an integer number (1343341008).

Almost surely, 2^4030023021 is an apocalyptic number.

It is an amenable number.

4030023021 is a deficient number, since it is larger than the sum of its proper divisors (1343341011).

4030023021 is a wasteful number, since it uses less digits than its factorization.

4030023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343341010.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 4030023021 is about 63482.4623104681. The cubic root of 4030023021 is about 1591.3627046335.

Adding to 4030023021 its reverse (1203200304), we get a palindrome (5233223325).

The spelling of 4030023021 in words is "four billion, thirty million, twenty-three thousand, twenty-one".