4006204421 has 4 divisors (see below), whose sum is σ = 4042958700. Its totient is φ = 3969450144.

The previous prime is 4006204417. The next prime is 4006204451. The reversal of 4006204421 is 1244026004.

4006204421 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.

It can be written as a sum of positive squares in 2 ways, for example, as 1934680225 + 2071524196 = 43985^2 + 45514^2 .

It is a cyclic number.

It is not a de Polignac number, because 4006204421 - 2² = 4006204417 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 (4006204451) 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, 18376976 + ... + 18377193.

It is an arithmetic number, because the mean of its divisors is an integer number (1010739675).

Almost surely, 2^4006204421 is an apocalyptic number.

It is an amenable number.

4006204421 is a deficient number, since it is larger than the sum of its proper divisors (36754279).

4006204421 is a wasteful number, since it uses less digits than its factorization.

4006204421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36754278.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 4006204421 is about 63294.5844523842. The cubic root of 4006204421 is about 1588.2213700163.

The spelling of 4006204421 in words is "four billion, six million, two hundred four thousand, four hundred twenty-one".