30905011 has 4 divisors (see below), whose sum is σ = 30917272. Its totient is φ = 30892752.

The previous prime is 30904999. The next prime is 30905029. The reversal of 30905011 is 11050903.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 30905011 - 2¹³ = 30896819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30905011.

It is not an unprimeable number, because it can be changed into a prime (30905041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 810 + ... + 7903.

It is an arithmetic number, because the mean of its divisors is an integer number (7729318).

Almost surely, 2^30905011 is an apocalyptic number.

30905011 is a deficient number, since it is larger than the sum of its proper divisors (12261).

30905011 is an equidigital number, since it uses as much as digits as its factorization.

30905011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12260.

The product of its (nonzero) digits is 135, while the sum is 19.

The square root of 30905011 is about 5559.2275542561. The cubic root of 30905011 is about 313.8168803949.

Adding to 30905011 its reverse (11050903), we get a palindrome (41955914).

The spelling of 30905011 in words is "thirty million, nine hundred five thousand, eleven".