30020557356 has 144 divisors (see below), whose sum is σ = 80463801600. Its totient is φ = 9421977600.

The previous prime is 30020557351. The next prime is 30020557367. The reversal of 30020557356 is 65375502003.

30020557356 is a `hidden beast` number, since 30 + 0 + 2 + 0 + 5 + 573 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 30020557356.

It is not an unprimeable number, because it can be changed into a prime (30020557351) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23289160 + ... + 23290448.

It is an arithmetic number, because the mean of its divisors is an integer number (558776400).

Almost surely, 2^30020557356 is an apocalyptic number.

30020557356 is a gapful number since it is divisible by the number (36) 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 30020557356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40231900800).

30020557356 is an abundant number, since it is smaller than the sum of its proper divisors (50443244244).

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

30020557356 is a wasteful number, since it uses less digits than its factorization.

30020557356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880 (or 1875 counting only the distinct ones).

The product of its (nonzero) digits is 94500, while the sum is 36.

The spelling of 30020557356 in words is "thirty billion, twenty million, five hundred fifty-seven thousand, three hundred fifty-six".