4020143631 has 16 divisors (see below), whose sum is σ = 6134313984. Its totient is φ = 2294082144.

The previous prime is 4020143627. The next prime is 4020143639. The reversal of 4020143631 is 1363410204.

It is not a de Polignac number, because 4020143631 - 2² = 4020143627 is a prime.

It is a super-2 number, since 2×4020143631² = 32323109627739728322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020143639) 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 15 ways as a sum of consecutive naturals, for example, 115191 + ... + 145976.

It is an arithmetic number, because the mean of its divisors is an integer number (383394624).

Almost surely, 2^4020143631 is an apocalyptic number.

4020143631 is a deficient number, since it is larger than the sum of its proper divisors (2114170353).

4020143631 is a wasteful number, since it uses less digits than its factorization.

4020143631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261910.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 4020143631 is about 63404.6026010731. The cubic root of 4020143631 is about 1590.0612598525.

Adding to 4020143631 its reverse (1363410204), we get a palindrome (5383553835).

The spelling of 4020143631 in words is "four billion, twenty million, one hundred forty-three thousand, six hundred thirty-one".