21550122463400 has 24 divisors (see below), whose sum is σ = 50104034727870. Its totient is φ = 8620048985280.

The previous prime is 21550122463391. The next prime is 21550122463433. The reversal of 21550122463400 is 436422105512.

It can be written as a sum of positive squares in 3 ways, for example, as 14900356569604 + 6649765893796 = 3860098^2 + 2578714^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53875305959 + ... + 53875306358.

Almost surely, 2^{21550122463400} is an apocalyptic number.

21550122463400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21550122463400 is an abundant number, since it is smaller than the sum of its proper divisors (28553912264470).

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

21550122463400 is a wasteful number, since it uses less digits than its factorization.

21550122463400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107750612333 (or 107750612324 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 21550122463400 its reverse (436422105512), we get a palindrome (21986544568912).

The spelling of 21550122463400 in words is "twenty-one trillion, five hundred fifty billion, one hundred twenty-two million, four hundred sixty-three thousand, four hundred".