42353618 has 4 divisors (see below), whose sum is σ = 63530430. Its totient is φ = 21176808.

The previous prime is 42353617. The next prime is 42353669. The reversal of 42353618 is 81635324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 34774609 + 7579009 = 5897^2 + 2753^2 .

It is not an unprimeable number, because it can be changed into a prime (42353617) 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 as a sum of consecutive naturals, namely, 10588403 + ... + 10588406.

Almost surely, 2^42353618 is an apocalyptic number.

42353618 is a deficient number, since it is larger than the sum of its proper divisors (21176812).

42353618 is a wasteful number, since it uses less digits than its factorization.

42353618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21176811.

The product of its digits is 17280, while the sum is 32.

The square root of 42353618 is about 6507.9657343904. The cubic root of 42353618 is about 348.5754834858.

The spelling of 42353618 in words is "forty-two million, three hundred fifty-three thousand, six hundred eighteen".