30820504536 has 112 divisors (see below), whose sum is σ = 86736239160. Its totient is φ = 10262453760.

The previous prime is 30820504531. The next prime is 30820504573. The reversal of 30820504536 is 63540502803.

It is a happy number.

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 30820504536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30820504531) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 6827016 + ... + 6831528.

Almost surely, 2^30820504536 is an apocalyptic number.

30820504536 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 30820504536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43368119580).

30820504536 is an abundant number, since it is smaller than the sum of its proper divisors (55915734624).

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

30820504536 is a wasteful number, since it uses less digits than its factorization.

30820504536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5708 (or 5689 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 30820504536 in words is "thirty billion, eight hundred twenty million, five hundred four thousand, five hundred thirty-six".