320331803618 has 16 divisors (see below), whose sum is σ = 498096143424. Its totient is φ = 154380668400.

The previous prime is 320331803611. The next prime is 320331803639. The reversal of 320331803618 is 816308133023.

It is a super-2 number, since 2×320331803618² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320331803611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20220158 + ... + 20235993.

It is an arithmetic number, because the mean of its divisors is an integer number (31131008964).

Almost surely, 2^320331803618 is an apocalyptic number.

320331803618 is a deficient number, since it is larger than the sum of its proper divisors (177764339806).

320331803618 is a wasteful number, since it uses less digits than its factorization.

320331803618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40456297.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 320331803618 in words is "three hundred twenty billion, three hundred thirty-one million, eight hundred three thousand, six hundred eighteen".