321013020018 has 16 divisors (see below), whose sum is σ = 647707687776. Its totient is φ = 106057398720.

The previous prime is 321013020017. The next prime is 321013020023. The reversal of 321013020018 is 810020310123.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 321013019976 and 321013020003.

It is not an unprimeable number, because it can be changed into a prime (321013020017) 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, 236734588 + ... + 236735943.

It is an arithmetic number, because the mean of its divisors is an integer number (40481730486).

Almost surely, 2^321013020018 is an apocalyptic number.

321013020018 is an abundant number, since it is smaller than the sum of its proper divisors (326694667758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321013020018 is a wasteful number, since it uses less digits than its factorization.

321013020018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473470649.

The product of its (nonzero) digits is 288, while the sum is 21.

The spelling of 321013020018 in words is "three hundred twenty-one billion, thirteen million, twenty thousand, eighteen".