30964021 has 12 divisors (see below), whose sum is σ = 36039276. Its totient is φ = 26491520.

The previous prime is 30964013. The next prime is 30964097. The reversal of 30964021 is 12046903.

It can be written as a sum of positive squares in 2 ways, for example, as 27300625 + 3663396 = 5225^2 + 1914^2 .

It is not a de Polignac number, because 30964021 - 2³ = 30964013 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 (30964001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5470 + ... + 9583.

It is an arithmetic number, because the mean of its divisors is an integer number (3003273).

Almost surely, 2^30964021 is an apocalyptic number.

It is an amenable number.

30964021 is a deficient number, since it is larger than the sum of its proper divisors (5075255).

30964021 is a wasteful number, since it uses less digits than its factorization.

30964021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15092 (or 15081 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 30964021 is about 5564.5324152169. The cubic root of 30964021 is about 314.0164872947.

It can be divided in two parts, 3096 and 4021, that added together give a palindrome (7117).

The spelling of 30964021 in words is "thirty million, nine hundred sixty-four thousand, twenty-one".