43042122020 has 12 divisors (see below), whose sum is σ = 90388456284. Its totient is φ = 17216848800.

The previous prime is 43042121953. The next prime is 43042122023. The reversal of 43042122020 is 2022124034.

It can be written as a sum of positive squares in 2 ways, for example, as 7541532964 + 35500589056 = 86842^2 + 188416^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 2152106101 = 43042122020 / (4 + 3 + 0 + 4 + 2 + 1 + 2 + 2 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 43042121983 and 43042122001.

It is not an unprimeable number, because it can be changed into a prime (43042122023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1076053031 + ... + 1076053070.

It is an arithmetic number, because the mean of its divisors is an integer number (7532371357).

Almost surely, 2^43042122020 is an apocalyptic number.

It is an amenable number.

43042122020 is an abundant number, since it is smaller than the sum of its proper divisors (47346334264).

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

43042122020 is a wasteful number, since it uses less digits than its factorization.

43042122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152106110 (or 2152106108 counting only the distinct ones).

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

Adding to 43042122020 its reverse (2022124034), we get a palindrome (45064246054).

The spelling of 43042122020 in words is "forty-three billion, forty-two million, one hundred twenty-two thousand, twenty".