20012220224 has 28 divisors (see below), whose sum is σ = 40362769668. Its totient is φ = 9842073600.

The previous prime is 20012220169. The next prime is 20012220251. The reversal of 20012220224 is 42202221002.

It can be written as a sum of positive squares in 2 ways, for example, as 3453677824 + 16558542400 = 58768^2 + 128680^2 .

It is a super-2 number, since 2×20012220224² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2559137 + ... + 2566944.

Almost surely, 2^20012220224 is an apocalyptic number.

It is an amenable number.

20012220224 is an abundant number, since it is smaller than the sum of its proper divisors (20350549444).

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

20012220224 is an equidigital number, since it uses as much as digits as its factorization.

20012220224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5126154 (or 5126144 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 20012220224 its reverse (42202221002), we get a palindrome (62214441226).

The spelling of 20012220224 in words is "twenty billion, twelve million, two hundred twenty thousand, two hundred twenty-four".