20210205243400 has 96 divisors (see below), whose sum is σ = 49045311613440. Its totient is φ = 7730456053760.

The previous prime is 20210205243329. The next prime is 20210205243433. The reversal of 20210205243400 is 434250201202.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 23 ways as a sum of consecutive naturals, for example, 16030857 + ... + 17245543.

It is an arithmetic number, because the mean of its divisors is an integer number (510888662640).

Almost surely, 2^{20210205243400} is an apocalyptic number.

20210205243400 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 20210205243400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24522655806720).

20210205243400 is an abundant number, since it is smaller than the sum of its proper divisors (28835106370040).

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

20210205243400 is a wasteful number, since it uses less digits than its factorization.

20210205243400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218343 (or 1218334 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 20210205243400 its reverse (434250201202), we get a palindrome (20644455444602).

The spelling of 20210205243400 in words is "twenty trillion, two hundred ten billion, two hundred five million, two hundred forty-three thousand, four hundred".