30180020 has 36 divisors (see below), whose sum is σ = 68635980. Its totient is φ = 11142144.

The previous prime is 30180001. The next prime is 30180047. The reversal of 30180020 is 2008103.

It can be written as a sum of positive squares in 6 ways, for example, as 14227984 + 15952036 = 3772^2 + 3994^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30179977 and 30180004.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1085 + ... + 7844.

It is an arithmetic number, because the mean of its divisors is an integer number (1906555).

Almost surely, 2^30180020 is an apocalyptic number.

It is an amenable number.

30180020 is an abundant number, since it is smaller than the sum of its proper divisors (38455960).

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

30180020 is a wasteful number, since it uses less digits than its factorization.

30180020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8964 (or 8949 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 30180020 is about 5493.6344982170. The cubic root of 30180020 is about 311.3435271048.

Adding to 30180020 its reverse (2008103), we get a palindrome (32188123).

The spelling of 30180020 in words is "thirty million, one hundred eighty thousand, twenty".