30534021 has 24 divisors (see below), whose sum is σ = 50666304. Its totient is φ = 17357760.

The previous prime is 30534011. The next prime is 30534029. The reversal of 30534021 is 12043503.

30534021 is a `hidden beast` number, since 305 + 340 + 21 = 666.

It is not a de Polignac number, because 30534021 - 2²² = 26339717 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30533985 and 30534003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30534029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12145 + ... + 14441.

It is an arithmetic number, because the mean of its divisors is an integer number (2111096).

Almost surely, 2^30534021 is an apocalyptic number.

30534021 is the 2954-th nonagonal number.

It is an amenable number.

30534021 is a deficient number, since it is larger than the sum of its proper divisors (20132283).

30534021 is a wasteful number, since it uses less digits than its factorization.

30534021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2521 (or 2518 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 30534021 is about 5525.7597667651. The cubic root of 30534021 is about 312.5561149363.

Adding to 30534021 its reverse (12043503), we get a palindrome (42577524).

It can be divided in two parts, 30 and 534021, that multiplied together give a triangular number (16020630 = T₅₆₆₀).

The spelling of 30534021 in words is "thirty million, five hundred thirty-four thousand, twenty-one".