21446455200 has 144 divisors (see below), whose sum is σ = 73482484320. Its totient is φ = 5418040320.

The previous prime is 21446455171. The next prime is 21446455201. The reversal of 21446455200 is 255464412.

It is not an unprimeable number, because it can be changed into a prime (21446455201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 189559 + ... + 280758.

It is an arithmetic number, because the mean of its divisors is an integer number (510295030).

Almost surely, 2^21446455200 is an apocalyptic number.

21446455200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21446455200 is an abundant number, since it is smaller than the sum of its proper divisors (52036029120).

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

21446455200 is a wasteful number, since it uses less digits than its factorization.

21446455200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470359 (or 470346 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

The spelling of 21446455200 in words is "twenty-one billion, four hundred forty-six million, four hundred fifty-five thousand, two hundred".