43021418 has 16 divisors (see below), whose sum is σ = 70507584. Its totient is φ = 19524960.

The previous prime is 43021399. The next prime is 43021421. The reversal of 43021418 is 81412034.

It is a junction number, because it is equal to n+sod(n) for n = 43021393 and 43021402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19571 + ... + 21657.

It is an arithmetic number, because the mean of its divisors is an integer number (4406724).

Almost surely, 2^43021418 is an apocalyptic number.

43021418 is a deficient number, since it is larger than the sum of its proper divisors (27486166).

43021418 is a wasteful number, since it uses less digits than its factorization.

43021418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3037.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 43021418 is about 6559.0714281825. The cubic root of 43021418 is about 350.3979636548.

The spelling of 43021418 in words is "forty-three million, twenty-one thousand, four hundred eighteen".