30005020 has 24 divisors (see below), whose sum is σ = 63512064. Its totient is φ = 11906496.

The previous prime is 30005011. The next prime is 30005023. The reversal of 30005020 is 2050003.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 30004988 and 30005006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30005023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3367 + ... + 8446.

It is an arithmetic number, because the mean of its divisors is an integer number (2646336).

Almost surely, 2^30005020 is an apocalyptic number.

It is an amenable number.

30005020 is an abundant number, since it is smaller than the sum of its proper divisors (33507044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30005020 is a wasteful number, since it uses less digits than its factorization.

30005020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11949 (or 11947 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 10.

The square root of 30005020 is about 5477.6838170891. The cubic root of 30005020 is about 310.7405810812.

Adding to 30005020 its reverse (2050003), we get a palindrome (32055023).

The spelling of 30005020 in words is "thirty million, five thousand, twenty".