21344153200 has 60 divisors (see below), whose sum is σ = 51368755840. Its totient is φ = 8522772480.

The previous prime is 21344153183. The next prime is 21344153213. The reversal of 21344153200 is 235144312.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184561 + ... + 277039.

Almost surely, 2^21344153200 is an apocalyptic number.

21344153200 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 21344153200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25684377920).

21344153200 is an abundant number, since it is smaller than the sum of its proper divisors (30024602640).

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

21344153200 is a wasteful number, since it uses less digits than its factorization.

21344153200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93074 (or 93063 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 21344153200 its reverse (235144312), we get a palindrome (21579297512).

The spelling of 21344153200 in words is "twenty-one billion, three hundred forty-four million, one hundred fifty-three thousand, two hundred".