30818961 has 12 divisors (see below), whose sum is σ = 46165392. Its totient is φ = 20545812.

The previous prime is 30818959. The next prime is 30818971. The reversal of 30818961 is 16981803.

It is not a de Polignac number, because 30818961 - 2¹ = 30818959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30818951) 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 11 ways as a sum of consecutive naturals, for example, 63171 + ... + 63656.

It is an arithmetic number, because the mean of its divisors is an integer number (3847116).

Almost surely, 2^30818961 is an apocalyptic number.

It is an amenable number.

30818961 is a deficient number, since it is larger than the sum of its proper divisors (15346431).

30818961 is an equidigital number, since it uses as much as digits as its factorization.

30818961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126842 (or 126830 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 30818961 is about 5551.4827748990. The cubic root of 30818961 is about 313.5253522228.

The spelling of 30818961 in words is "thirty million, eight hundred eighteen thousand, nine hundred sixty-one".