4020320520 has 64 divisors (see below), whose sum is σ = 13401072000. Its totient is φ = 1072085184.

The previous prime is 4020320519. The next prime is 4020320567. The reversal of 4020320520 is 250230204.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 4020320493 and 4020320502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1860180 + ... + 1862339.

It is an arithmetic number, because the mean of its divisors is an integer number (209391750).

Almost surely, 2^4020320520 is an apocalyptic number.

4020320520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4020320520 is an abundant number, since it is smaller than the sum of its proper divisors (9380751480).

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

4020320520 is a wasteful number, since it uses less digits than its factorization.

4020320520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3722539 (or 3722529 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 4020320520 is about 63405.9975081222. The cubic root of 4020320520 is about 1590.0845807623.

Adding to 4020320520 its reverse (250230204), we get a palindrome (4270550724).

The spelling of 4020320520 in words is "four billion, twenty million, three hundred twenty thousand, five hundred twenty".