22021845040 has 80 divisors (see below), whose sum is σ = 55234777248. Its totient is φ = 8117065728.

The previous prime is 22021845023. The next prime is 22021845047. The reversal of 22021845040 is 4054812022.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (22021845047) 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, 592444 + ... + 628516.

Almost surely, 2^22021845040 is an apocalyptic number.

22021845040 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 22021845040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27617388624).

22021845040 is an abundant number, since it is smaller than the sum of its proper divisors (33212932208).

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

22021845040 is a wasteful number, since it uses less digits than its factorization.

22021845040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36686 (or 36680 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

The spelling of 22021845040 in words is "twenty-two billion, twenty-one million, eight hundred forty-five thousand, forty".