22020581478 has 256 divisors, whose sum is σ = 56770560000. Its totient is φ = 5672177280.

The previous prime is 22020581477. The next prime is 22020581497. The reversal of 22020581478 is 87418502022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22020581477) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 63096048 + ... + 63096396.

It is an arithmetic number, because the mean of its divisors is an integer number (221760000).

Almost surely, 2^22020581478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22020581478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28385280000).

22020581478 is an abundant number, since it is smaller than the sum of its proper divisors (34749978522).

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

22020581478 is a wasteful number, since it uses less digits than its factorization.

22020581478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 458 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 39.

The spelling of 22020581478 in words is "twenty-two billion, twenty million, five hundred eighty-one thousand, four hundred seventy-eight".