30118021 has 8 divisors (see below), whose sum is σ = 31805600. Its totient is φ = 28440720.

The previous prime is 30118013. The next prime is 30118031. The reversal of 30118021 is 12081103.

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

It is not a de Polignac number, because 30118021 - 2³ = 30118013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30117986 and 30118004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30118031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3895 + ... + 8683.

It is an arithmetic number, because the mean of its divisors is an integer number (3975700).

Almost surely, 2^30118021 is an apocalyptic number.

It is an amenable number.

30118021 is a deficient number, since it is larger than the sum of its proper divisors (1687579).

30118021 is a wasteful number, since it uses less digits than its factorization.

30118021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5139.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 30118021 is about 5487.9887937203. The cubic root of 30118021 is about 311.1301826413.

Adding to 30118021 its reverse (12081103), we get a palindrome (42199124).

The spelling of 30118021 in words is "thirty million, one hundred eighteen thousand, twenty-one".