30204020 has 72 divisors (see below), whose sum is σ = 79723392. Its totient is φ = 9408960.

The previous prime is 30203989. The next prime is 30204059. The reversal of 30204020 is 2040203.

30204020 = 441² + 442² + ... + 560².

It is a Harshad number since it is a multiple of its sum of digits (11).

It is a junction number, because it is equal to n+sod(n) for n = 30203992 and 30204010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16049 + ... + 17831.

Almost surely, 2^30204020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30204020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39861696).

30204020 is an abundant number, since it is smaller than the sum of its proper divisors (49519372).

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

30204020 is a wasteful number, since it uses less digits than its factorization.

30204020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821 (or 1808 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 30204020 is about 5495.8184103917. The cubic root of 30204020 is about 311.4260349451.

Adding to 30204020 its reverse (2040203), we get a palindrome (32244223).

The spelling of 30204020 in words is "thirty million, two hundred four thousand, twenty".