30118820 has 24 divisors (see below), whose sum is σ = 65431800. Its totient is φ = 11631872.

The previous prime is 30118817. The next prime is 30118831. The reversal of 30118820 is 2881103.

It can be written as a sum of positive squares in 4 ways, for example, as 10705984 + 19412836 = 3272^2 + 4406^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25385 + ... + 26544.

It is an arithmetic number, because the mean of its divisors is an integer number (2726325).

Almost surely, 2^30118820 is an apocalyptic number.

It is an amenable number.

30118820 is an abundant number, since it is smaller than the sum of its proper divisors (35312980).

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

30118820 is a wasteful number, since it uses less digits than its factorization.

30118820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51967 (or 51965 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 30118820 is about 5488.0615885757. The cubic root of 30118820 is about 311.1329339378.

Adding to 30118820 its reverse (2881103), we get a palindrome (32999923).

The spelling of 30118820 in words is "thirty million, one hundred eighteen thousand, eight hundred twenty".