42023818 has 8 divisors (see below), whose sum is σ = 63251748. Its totient is φ = 20939904.

The previous prime is 42023809. The next prime is 42023819. The reversal of 42023818 is 81832024.

It can be written as a sum of positive squares in 2 ways, for example, as 41049649 + 974169 = 6407^2 + 987^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (42023819) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 35271 + ... + 36442.

Almost surely, 2^42023818 is an apocalyptic number.

42023818 is a deficient number, since it is larger than the sum of its proper divisors (21227930).

42023818 is a wasteful number, since it uses less digits than its factorization.

42023818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72008.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 42023818 is about 6482.5780365531. The cubic root of 42023818 is about 347.6683600103.

The spelling of 42023818 in words is "forty-two million, twenty-three thousand, eight hundred eighteen".