30918853 has 6 divisors (see below), whose sum is σ = 35966886. Its totient is φ = 26501832.

The previous prime is 30918821. The next prime is 30918857. The reversal of 30918853 is 35881903.

It can be written as a sum of positive squares in only one way, i.e., 19201924 + 11716929 = 4382^2 + 3423^2 .

It is not a de Polignac number, because 30918853 - 2⁵ = 30918821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30918857) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 315450 + ... + 315547.

It is an arithmetic number, because the mean of its divisors is an integer number (5994481).

Almost surely, 2^30918853 is an apocalyptic number.

It is an amenable number.

30918853 is a deficient number, since it is larger than the sum of its proper divisors (5048033).

30918853 is an equidigital number, since it uses as much as digits as its factorization.

30918853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631011 (or 631004 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 30918853 is about 5560.4723720202. The cubic root of 30918853 is about 313.8637250625.

The spelling of 30918853 in words is "thirty million, nine hundred eighteen thousand, eight hundred fifty-three".