642308018 has 8 divisors (see below), whose sum is σ = 1051049520. Its totient is φ = 291958180.

The previous prime is 642307993. The next prime is 642308039. The reversal of 642308018 is 810803246.

642308018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14597888 + ... + 14597931.

It is an arithmetic number, because the mean of its divisors is an integer number (131381190).

Almost surely, 2^642308018 is an apocalyptic number.

642308018 is a deficient number, since it is larger than the sum of its proper divisors (408741502).

642308018 is a wasteful number, since it uses less digits than its factorization.

642308018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29195832.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 642308018 is about 25343.7964401547. The cubic root of 642308018 is about 862.8085653079.

The spelling of 642308018 in words is "six hundred forty-two million, three hundred eight thousand, eighteen".