30203440020 has 216 divisors, whose sum is σ = 100127827800. Its totient is φ = 7365676032.

The previous prime is 30203440019. The next prime is 30203440037. The reversal of 30203440020 is 2004430203.

30203440020 is a `hidden beast` number, since 3 + 0 + 203 + 440 + 0 + 20 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 20677289616 + 9526150404 = 143796^2 + 97602^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 30203439975 and 30203440002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3311226 + ... + 3320334.

Almost surely, 2^30203440020 is an apocalyptic number.

30203440020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30203440020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50063913900).

30203440020 is an abundant number, since it is smaller than the sum of its proper divisors (69924387780).

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

30203440020 is a wasteful number, since it uses less digits than its factorization.

30203440020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9259 (or 9241 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

Adding to 30203440020 its reverse (2004430203), we get a palindrome (32207870223).

The spelling of 30203440020 in words is "thirty billion, two hundred three million, four hundred forty thousand, twenty".