30675021 has 24 divisors (see below), whose sum is σ = 46906560. Its totient is φ = 17761536.

The previous prime is 30675017. The next prime is 30675041. The reversal of 30675021 is 12057603.

It is not a de Polignac number, because 30675021 - 2² = 30675017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30674982 and 30675000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30675041) 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, 6840 + ... + 10398.

It is an arithmetic number, because the mean of its divisors is an integer number (1954440).

Almost surely, 2^30675021 is an apocalyptic number.

It is an amenable number.

30675021 is a deficient number, since it is larger than the sum of its proper divisors (16231539).

30675021 is a wasteful number, since it uses less digits than its factorization.

30675021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3605 (or 3592 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 30675021 is about 5538.5034982385. The cubic root of 30675021 is about 313.0364834798.

The spelling of 30675021 in words is "thirty million, six hundred seventy-five thousand, twenty-one".