30918634 has 16 divisors (see below), whose sum is σ = 47691072. Its totient is φ = 15025248.

The previous prime is 30918623. The next prime is 30918697. The reversal of 30918634 is 43681903.

It is a self number, because there is not a number n which added to its sum of digits gives 30918634.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19267 + ... + 20809.

It is an arithmetic number, because the mean of its divisors is an integer number (2980692).

Almost surely, 2^30918634 is an apocalyptic number.

30918634 is a deficient number, since it is larger than the sum of its proper divisors (16772438).

30918634 is a wasteful number, since it uses less digits than its factorization.

30918634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 30918634 is about 5560.4526794138. The cubic root of 30918634 is about 313.8629840225.

The spelling of 30918634 in words is "thirty million, nine hundred eighteen thousand, six hundred thirty-four".