30069921 has 16 divisors (see below), whose sum is σ = 46687104. Its totient is φ = 16857984.

The previous prime is 30069911. The next prime is 30069929. The reversal of 30069921 is 12996003.

It is not a de Polignac number, because 30069921 - 2¹⁴ = 30053537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30069929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12396 + ... + 14621.

It is an arithmetic number, because the mean of its divisors is an integer number (2917944).

Almost surely, 2^30069921 is an apocalyptic number.

It is an amenable number.

30069921 is a deficient number, since it is larger than the sum of its proper divisors (16617183).

30069921 is a wasteful number, since it uses less digits than its factorization.

30069921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27080.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 30069921 is about 5483.6047450559. The cubic root of 30069921 is about 310.9644641869.

The spelling of 30069921 in words is "thirty million, sixty-nine thousand, nine hundred twenty-one".