43000018 has 16 divisors (see below), whose sum is σ = 68739840. Its totient is φ = 20126656.

The previous prime is 42999977. The next prime is 43000019. The reversal of 43000018 is 81000034.

It is a junction number, because it is equal to n+sod(n) for n = 42999965 and 43000010.

It is not an unprimeable number, because it can be changed into a prime (43000019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7783 + ... + 12106.

It is an arithmetic number, because the mean of its divisors is an integer number (4296240).

Almost surely, 2^43000018 is an apocalyptic number.

43000018 is a deficient number, since it is larger than the sum of its proper divisors (25739822).

43000018 is a wasteful number, since it uses less digits than its factorization.

43000018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19961.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 43000018 is about 6557.4398967890. The cubic root of 43000018 is about 350.3398549233.

Adding to 43000018 its sum of digits (16), we get a palindrome (43000034).

The spelling of 43000018 in words is "forty-three million, eighteen", and thus it is an aban number and an uban number.