20144121420 has 192 divisors, whose sum is σ = 58887392256. Its totient is φ = 5141283840.

The previous prime is 20144121391. The next prime is 20144121449. The reversal of 20144121420 is 2412144102.

It is an interprime number because it is at equal distance from previous prime (20144121391) and next prime (20144121449).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 50740662 + ... + 50741058.

It is an arithmetic number, because the mean of its divisors is an integer number (306705168).

Almost surely, 2^20144121420 is an apocalyptic number.

20144121420 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 20144121420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29443696128).

20144121420 is an abundant number, since it is smaller than the sum of its proper divisors (38743270836).

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

20144121420 is a wasteful number, since it uses less digits than its factorization.

20144121420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800 (or 798 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 20144121420 its reverse (2412144102), we get a palindrome (22556265522).

The spelling of 20144121420 in words is "twenty billion, one hundred forty-four million, one hundred twenty-one thousand, four hundred twenty".