22000321500 has 96 divisors (see below), whose sum is σ = 64157184000. Its totient is φ = 5858305600.

The previous prime is 22000321489. The next prime is 22000321501. The reversal of 22000321500 is 512300022.

It is a super-2 number, since 2×22000321500² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22000321500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22000321501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1068301 + ... + 1088699.

It is an arithmetic number, because the mean of its divisors is an integer number (668304000).

Almost surely, 2^22000321500 is an apocalyptic number.

22000321500 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 22000321500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32078592000).

22000321500 is an abundant number, since it is smaller than the sum of its proper divisors (42156862500).

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

22000321500 is a wasteful number, since it uses less digits than its factorization.

22000321500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21140 (or 21128 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

Adding to 22000321500 its reverse (512300022), we get a palindrome (22512621522).

The spelling of 22000321500 in words is "twenty-two billion, three hundred twenty-one thousand, five hundred".