2100020043 has 16 divisors (see below), whose sum is σ = 3060720000. Its totient is φ = 1270178880.

The previous prime is 2100020033. The next prime is 2100020071. The reversal of 2100020043 is 3400200012.

It is not a de Polignac number, because 2100020043 - 2⁸ = 2100019787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2100020003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47298 + ... + 80231.

It is an arithmetic number, because the mean of its divisors is an integer number (191295000).

Almost surely, 2^2100020043 is an apocalyptic number.

2100020043 is a deficient number, since it is larger than the sum of its proper divisors (960699957).

2100020043 is a wasteful number, since it uses less digits than its factorization.

2100020043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128042.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 2100020043 is about 45825.9756360953. The cubic root of 2100020043 is about 1280.5832390457.

Adding to 2100020043 its reverse (3400200012), we get a palindrome (5500220055).

The spelling of 2100020043 in words is "two billion, one hundred million, twenty thousand, forty-three".