30675621 has 16 divisors (see below), whose sum is σ = 42024960. Its totient is φ = 19896240.

The previous prime is 30675587. The next prime is 30675637. The reversal of 30675621 is 12657603.

It is not a de Polignac number, because 30675621 - 2²¹ = 28578469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30675691) 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 15 ways as a sum of consecutive naturals, for example, 15916 + ... + 17738.

It is an arithmetic number, because the mean of its divisors is an integer number (2626560).

Almost surely, 2^30675621 is an apocalyptic number.

It is an amenable number.

30675621 is a deficient number, since it is larger than the sum of its proper divisors (11349339).

30675621 is a wasteful number, since it uses less digits than its factorization.

30675621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 30675621 is about 5538.5576642299. The cubic root of 30675621 is about 313.0385244528.

The spelling of 30675621 in words is "thirty million, six hundred seventy-five thousand, six hundred twenty-one".