20415143200 has 72 divisors (see below), whose sum is σ = 49912774128. Its totient is φ = 8153882880.

The previous prime is 20415143191. The next prime is 20415143269. The reversal of 20415143200 is 234151402.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 527719 + ... + 565081.

It is an arithmetic number, because the mean of its divisors is an integer number (693232974).

Almost surely, 2^20415143200 is an apocalyptic number.

20415143200 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 20415143200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24956387064).

20415143200 is an abundant number, since it is smaller than the sum of its proper divisors (29497630928).

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

20415143200 is a wasteful number, since it uses less digits than its factorization.

20415143200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38066 (or 38053 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 20415143200 its reverse (234151402), we get a palindrome (20649294602).

The spelling of 20415143200 in words is "twenty billion, four hundred fifteen million, one hundred forty-three thousand, two hundred".