4020631530 has 64 divisors (see below), whose sum is σ = 9858792960. Its totient is φ = 1049158656.

The previous prime is 4020631501. The next prime is 4020631607. The reversal of 4020631530 is 351360204.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 4020631530.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 260304 + ... + 275316.

It is an arithmetic number, because the mean of its divisors is an integer number (154043640).

Almost surely, 2^4020631530 is an apocalyptic number.

4020631530 is an abundant number, since it is smaller than the sum of its proper divisors (5838161430).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4020631530 is a wasteful number, since it uses less digits than its factorization.

4020631530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15215.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 4020631530 is about 63408.4499889407. The cubic root of 4020631530 is about 1590.1255824230.

Adding to 4020631530 its reverse (351360204), we get a palindrome (4371991734).

The spelling of 4020631530 in words is "four billion, twenty million, six hundred thirty-one thousand, five hundred thirty".