22543522020 has 96 divisors (see below), whose sum is σ = 70253111040. Its totient is φ = 6001516800.

The previous prime is 22543521991. The next prime is 22543522033. The reversal of 22543522020 is 2022534522.

22543522020 is a `hidden beast` number, since 2 + 2 + 5 + 435 + 220 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 289809 + ... + 359271.

It is an arithmetic number, because the mean of its divisors is an integer number (731803240).

Almost surely, 2^22543522020 is an apocalyptic number.

22543522020 is a gapful number since it is divisible by the number (20) 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 22543522020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35126555520).

22543522020 is an abundant number, since it is smaller than the sum of its proper divisors (47709589020).

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

22543522020 is a wasteful number, since it uses less digits than its factorization.

22543522020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70082 (or 70074 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The spelling of 22543522020 in words is "twenty-two billion, five hundred forty-three million, five hundred twenty-two thousand, twenty".