2018672021 has 8 divisors (see below), whose sum is σ = 2137988160. Its totient is φ = 1899419328.

The previous prime is 2018671999. The next prime is 2018672057. The reversal of 2018672021 is 1202768102.

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

It is a cyclic number.

It is not a de Polignac number, because 2018672021 - 2⁶ = 2018671957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2018672221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60080 + ... + 87446.

It is an arithmetic number, because the mean of its divisors is an integer number (267248520).

Almost surely, 2^2018672021 is an apocalyptic number.

It is an amenable number.

2018672021 is a deficient number, since it is larger than the sum of its proper divisors (119316139).

2018672021 is a wasteful number, since it uses less digits than its factorization.

2018672021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31723.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 2018672021 is about 44929.6341071236. The cubic root of 2018672021 is about 1263.8297897190.

The spelling of 2018672021 in words is "two billion, eighteen million, six hundred seventy-two thousand, twenty-one".