20168812224 has 168 divisors, whose sum is σ = 63137198592. Its totient is φ = 6104839680.

The previous prime is 20168812201. The next prime is 20168812229. The reversal of 20168812224 is 42221886102.

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

It is not an unprimeable number, because it can be changed into a prime (20168812229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9775417 + ... + 9777479.

Almost surely, 2^20168812224 is an apocalyptic number.

20168812224 is a gapful number since it is divisible by the number (24) 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 20168812224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31568599296).

20168812224 is an abundant number, since it is smaller than the sum of its proper divisors (42968386368).

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

20168812224 is a wasteful number, since it uses less digits than its factorization.

20168812224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3635 (or 3622 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The spelling of 20168812224 in words is "twenty billion, one hundred sixty-eight million, eight hundred twelve thousand, two hundred twenty-four".