4020004431 has 8 divisors (see below), whose sum is σ = 5955562160. Its totient is φ = 2680002936.

The previous prime is 4020004409. The next prime is 4020004463. The reversal of 4020004431 is 1344000204.

It is not a de Polignac number, because 4020004431 - 2¹⁵ = 4019971663 is a prime.

It is a super-2 number, since 2×4020004431² = 32320871250519267522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020004631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74444500 + ... + 74444553.

It is an arithmetic number, because the mean of its divisors is an integer number (744445270).

Almost surely, 2^4020004431 is an apocalyptic number.

4020004431 is a deficient number, since it is larger than the sum of its proper divisors (1935557729).

4020004431 is a wasteful number, since it uses less digits than its factorization.

4020004431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148889062 (or 148889056 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 4020004431 is about 63403.5048794623. The cubic root of 4020004431 is about 1590.0429073505.

Adding to 4020004431 its reverse (1344000204), we get a palindrome (5364004635).

The spelling of 4020004431 in words is "four billion, twenty million, four thousand, four hundred thirty-one".