22251240000 has 560 divisors, whose sum is σ = 89220690240. Its totient is φ = 5391360000.

The previous prime is 22251239993. The next prime is 22251240113. The reversal of 22251240000 is 4215222.

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

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 11879064 + ... + 11880936.

Almost surely, 2^22251240000 is an apocalyptic number.

22251240000 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 22251240000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44610345120).

22251240000 is an abundant number, since it is smaller than the sum of its proper divisors (66969450240).

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

22251240000 is a wasteful number, since it uses less digits than its factorization.

22251240000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925 (or 1894 counting only the distinct ones).

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

Adding to 22251240000 its reverse (4215222), we get a palindrome (22255455222).

The spelling of 22251240000 in words is "twenty-two billion, two hundred fifty-one million, two hundred forty thousand".