321012018 has 32 divisors (see below), whose sum is σ = 716166720. Its totient is φ = 106583040.

The previous prime is 321012017. The next prime is 321012019. The reversal of 321012018 is 810210123.

It is an interprime number because it is at equal distance from previous prime (321012017) and next prime (321012019).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (321012017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2313 + ... + 25443.

It is an arithmetic number, because the mean of its divisors is an integer number (22380210).

Almost surely, 2^321012018 is an apocalyptic number.

321012018 is an abundant number, since it is smaller than the sum of its proper divisors (395154702).

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

321012018 is a wasteful number, since it uses less digits than its factorization.

321012018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23399 (or 23393 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 321012018 is about 17916.8082537041. The cubic root of 321012018 is about 684.7106725625.

The spelling of 321012018 in words is "three hundred twenty-one million, twelve thousand, eighteen".