22718251008 has 272 divisors, whose sum is σ = 69331316160. Its totient is φ = 7346847744.

The previous prime is 22718251001. The next prime is 22718251051. The reversal of 22718251008 is 80015281722.

It is a super-2 number, since 2×22718251008² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22718251001) 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, 65470291 + ... + 65470637.

Almost surely, 2^22718251008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22718251008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34665658080).

22718251008 is an abundant number, since it is smaller than the sum of its proper divisors (46613065152).

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

22718251008 is an frugal number, since it uses more digits than its factorization.

22718251008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The spelling of 22718251008 in words is "twenty-two billion, seven hundred eighteen million, two hundred fifty-one thousand, eight".