30020071 has 4 divisors (see below), whose sum is σ = 30311632. Its totient is φ = 29728512.

The previous prime is 30020051. The next prime is 30020119. The reversal of 30020071 is 17002003.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17002003 = 41 ⋅414683.

It is a cyclic number.

It is not a de Polignac number, because 30020071 - 2¹⁹ = 29495783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30020041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145626 + ... + 145831.

It is an arithmetic number, because the mean of its divisors is an integer number (7577908).

Almost surely, 2^30020071 is an apocalyptic number.

30020071 is a deficient number, since it is larger than the sum of its proper divisors (291561).

30020071 is a wasteful number, since it uses less digits than its factorization.

30020071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291560.

The product of its (nonzero) digits is 42, while the sum is 13.

The square root of 30020071 is about 5479.0574919415. The cubic root of 30020071 is about 310.7925298850.

Adding to 30020071 its reverse (17002003), we get a palindrome (47022074).

The spelling of 30020071 in words is "thirty million, twenty thousand, seventy-one".