20012213424 has 160 divisors (see below), whose sum is σ = 59916879360. Its totient is φ = 5637666816.

The previous prime is 20012213413. The next prime is 20012213461. The reversal of 20012213424 is 42431221002.

It is a super-2 number, since 2×20012213424² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20012213424.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8375622 + ... + 8378010.

It is an arithmetic number, because the mean of its divisors is an integer number (374480496).

Almost surely, 2^20012213424 is an apocalyptic number.

20012213424 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 20012213424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29958439680).

20012213424 is an abundant number, since it is smaller than the sum of its proper divisors (39904665936).

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

20012213424 is a wasteful number, since it uses less digits than its factorization.

20012213424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2747 (or 2741 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20012213424 its reverse (42431221002), we get a palindrome (62443434426).

The spelling of 20012213424 in words is "twenty billion, twelve million, two hundred thirteen thousand, four hundred twenty-four".