30131020 has 12 divisors (see below), whose sum is σ = 63275184. Its totient is φ = 12052400.

The previous prime is 30130999. The next prime is 30131033. The reversal of 30131020 is 2013103.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 30130988 and 30131006.

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 3 ways as a sum of consecutive naturals, for example, 753256 + ... + 753295.

It is an arithmetic number, because the mean of its divisors is an integer number (5272932).

Almost surely, 2^30131020 is an apocalyptic number.

It is an amenable number.

30131020 is an abundant number, since it is smaller than the sum of its proper divisors (33144164).

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

30131020 is a wasteful number, since it uses less digits than its factorization.

30131020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506560 (or 1506558 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 30131020 is about 5489.1729796027. The cubic root of 30131020 is about 311.1749376794.

Adding to 30131020 its reverse (2013103), we get a palindrome (32144123).

The spelling of 30131020 in words is "thirty million, one hundred thirty-one thousand, twenty".