22506576640 has 144 divisors (see below), whose sum is σ = 54599328000. Its totient is φ = 8888463360.

The previous prime is 22506576629. The next prime is 22506576643. The reversal of 22506576640 is 4667560522.

It is not an unprimeable number, because it can be changed into a prime (22506576643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45103111 + ... + 45103609.

It is an arithmetic number, because the mean of its divisors is an integer number (379162000).

Almost surely, 2^22506576640 is an apocalyptic number.

22506576640 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 22506576640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27299664000).

22506576640 is an abundant number, since it is smaller than the sum of its proper divisors (32092751360).

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

22506576640 is a wasteful number, since it uses less digits than its factorization.

22506576640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898 (or 884 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 43.

The spelling of 22506576640 in words is "twenty-two billion, five hundred six million, five hundred seventy-six thousand, six hundred forty".