43123100020 has 192 divisors, whose sum is σ = 121866264576. Its totient is φ = 12378769920.

The previous prime is 43123099969. The next prime is 43123100029. The reversal of 43123100020 is 2000132134.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 43123099967 and 43123100003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43123100029) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9747529 + ... + 9751951.

It is an arithmetic number, because the mean of its divisors is an integer number (634720128).

Almost surely, 2^43123100020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43123100020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60933132288).

43123100020 is an abundant number, since it is smaller than the sum of its proper divisors (78743164556).

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

43123100020 is a wasteful number, since it uses less digits than its factorization.

43123100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4950 (or 4948 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 43123100020 its reverse (2000132134), we get a palindrome (45123232154).

The spelling of 43123100020 in words is "forty-three billion, one hundred twenty-three million, one hundred thousand, twenty".