30846921 has 24 divisors (see below), whose sum is σ = 48109824. Its totient is φ = 17529120.

The previous prime is 30846919. The next prime is 30846941. The reversal of 30846921 is 12964803.

It is not a de Polignac number, because 30846921 - 2¹ = 30846919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30846941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32311 + ... + 33251.

It is an arithmetic number, because the mean of its divisors is an integer number (2004576).

Almost surely, 2^30846921 is an apocalyptic number.

It is an amenable number.

30846921 is a deficient number, since it is larger than the sum of its proper divisors (17262903).

30846921 is a wasteful number, since it uses less digits than its factorization.

30846921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181 (or 1174 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 30846921 is about 5554.0004501260. Note that the first 3 decimals coincide. The cubic root of 30846921 is about 313.6201371529.

It can be divided in two parts, 30 and 846921, that added together give a triangular number (846951 = T₁₃₀₁).

The spelling of 30846921 in words is "thirty million, eight hundred forty-six thousand, nine hundred twenty-one".