2120438443 has 16 divisors (see below), whose sum is σ = 2232172800. Its totient is φ = 2011595040.

The previous prime is 2120438431. The next prime is 2120438449. The reversal of 2120438443 is 3448340212.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120438443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120438449) 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, 388588 + ... + 394006.

It is an arithmetic number, because the mean of its divisors is an integer number (139510800).

Almost surely, 2^2120438443 is an apocalyptic number.

2120438443 is a deficient number, since it is larger than the sum of its proper divisors (111734357).

2120438443 is a wasteful number, since it uses less digits than its factorization.

2120438443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5682.

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 2120438443 is about 46048.2186734731. The cubic root of 2120438443 is about 1284.7202110040.

Adding to 2120438443 its reverse (3448340212), we get a palindrome (5568778655).

The spelling of 2120438443 in words is "two billion, one hundred twenty million, four hundred thirty-eight thousand, four hundred forty-three".