30686013 has 16 divisors (see below), whose sum is σ = 46011840. Its totient is φ = 20209392.

The previous prime is 30686011. The next prime is 30686021. The reversal of 30686013 is 31068603.

It is not a de Polignac number, because 30686013 - 2¹ = 30686011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30686011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4606 + ... + 9087.

It is an arithmetic number, because the mean of its divisors is an integer number (2875740).

Almost surely, 2^30686013 is an apocalyptic number.

It is an amenable number.

30686013 is a deficient number, since it is larger than the sum of its proper divisors (15325827).

30686013 is a wasteful number, since it uses less digits than its factorization.

30686013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13785 (or 13779 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 30686013 is about 5539.4957351730. The cubic root of 30686013 is about 313.0738698830.

The spelling of 30686013 in words is "thirty million, six hundred eighty-six thousand, thirteen".