30020649 has 4 divisors (see below), whose sum is σ = 40027536. Its totient is φ = 20013764.

The previous prime is 30020621. The next prime is 30020659. The reversal of 30020649 is 94602003.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30020649 - 2¹⁹ = 29496361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30020659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5003439 + ... + 5003444.

It is an arithmetic number, because the mean of its divisors is an integer number (10006884).

Almost surely, 2^30020649 is an apocalyptic number.

It is an amenable number.

30020649 is a deficient number, since it is larger than the sum of its proper divisors (10006887).

30020649 is a wasteful number, since it uses less digits than its factorization.

30020649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10006886.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 30020649 is about 5479.1102379857. The cubic root of 30020649 is about 310.7945245164.

The spelling of 30020649 in words is "thirty million, twenty thousand, six hundred forty-nine".