22025421000 has 768 divisors, whose sum is σ = 89887449600. Its totient is φ = 4798464000.

The previous prime is 22025420951. The next prime is 22025421007. The reversal of 22025421000 is 12452022.

22025421000 is a `hidden beast` number, since 2 + 20 + 2 + 542 + 100 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22025421007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 38708716 + ... + 38709284.

It is an arithmetic number, because the mean of its divisors is an integer number (117040950).

Almost surely, 2^22025421000 is an apocalyptic number.

22025421000 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 22025421000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44943724800).

22025421000 is an abundant number, since it is smaller than the sum of its proper divisors (67862028600).

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

22025421000 is a wasteful number, since it uses less digits than its factorization.

22025421000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647 (or 630 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

Adding to 22025421000 its reverse (12452022), we get a palindrome (22037873022).

The spelling of 22025421000 in words is "twenty-two billion, twenty-five million, four hundred twenty-one thousand".