30450021 has 24 divisors (see below), whose sum is σ = 47442240. Its totient is φ = 17321472.

The previous prime is 30450019. The next prime is 30450023. The reversal of 30450021 is 12005403.

It is an interprime number because it is at equal distance from previous prime (30450019) and next prime (30450023).

It is not a de Polignac number, because 30450021 - 2¹ = 30450019 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30450023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52485 + ... + 53061.

It is an arithmetic number, because the mean of its divisors is an integer number (1976760).

Almost surely, 2^30450021 is an apocalyptic number.

It is an amenable number.

30450021 is a deficient number, since it is larger than the sum of its proper divisors (16992219).

30450021 is a wasteful number, since it uses less digits than its factorization.

30450021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953 (or 946 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 30450021 is about 5518.1537673392. The cubic root of 30450021 is about 312.2692346468.

Adding to 30450021 its reverse (12005403), we get a palindrome (42455424).

The spelling of 30450021 in words is "thirty million, four hundred fifty thousand, twenty-one".