43020020 has 12 divisors (see below), whose sum is σ = 90342084. Its totient is φ = 17208000.

The previous prime is 43019989. The next prime is 43020023. The reversal of 43020020 is 2002034.

43020020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 18852964 + 24167056 = 4342^2 + 4916^2 .

It is a junction number, because it is equal to n+sod(n) for n = 43019983 and 43020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43020023) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1075481 + ... + 1075520.

It is an arithmetic number, because the mean of its divisors is an integer number (7528507).

Almost surely, 2^43020020 is an apocalyptic number.

It is an amenable number.

43020020 is an abundant number, since it is smaller than the sum of its proper divisors (47322064).

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

43020020 is a wasteful number, since it uses less digits than its factorization.

43020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151010 (or 2151008 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 43020020 is about 6558.9648573536. The cubic root of 43020020 is about 350.3941681681.

Adding to 43020020 its reverse (2002034), we get a palindrome (45022054).

The spelling of 43020020 in words is "forty-three million, twenty thousand, twenty".