43220412020 has 48 divisors (see below), whose sum is σ = 91541490768. Its totient is φ = 17140177920.

The previous prime is 43220411999. The next prime is 43220412049. The reversal of 43220412020 is 2021402234.

It can be written as a sum of positive squares in 8 ways, for example, as 1016461924 + 42203950096 = 31882^2 + 205436^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 43220411983 and 43220412001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2239934 + ... + 2259146.

It is an arithmetic number, because the mean of its divisors is an integer number (1907114391).

Almost surely, 2^43220412020 is an apocalyptic number.

It is an amenable number.

43220412020 is an abundant number, since it is smaller than the sum of its proper divisors (48321078748).

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

43220412020 is a wasteful number, since it uses less digits than its factorization.

43220412020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20180 (or 20178 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 43220412020 its reverse (2021402234), we get a palindrome (45241814254).

The spelling of 43220412020 in words is "forty-three billion, two hundred twenty million, four hundred twelve thousand, twenty".