21533414200 has 96 divisors (see below), whose sum is σ = 52556636160. Its totient is φ = 8189244800.

The previous prime is 21533414197. The next prime is 21533414213. The reversal of 21533414200 is 241433512.

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 polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 754185 + ... + 782215.

It is an arithmetic number, because the mean of its divisors is an integer number (547464960).

Almost surely, 2^21533414200 is an apocalyptic number.

21533414200 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 21533414200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26278318080).

21533414200 is an abundant number, since it is smaller than the sum of its proper divisors (31023221960).

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

21533414200 is a wasteful number, since it uses less digits than its factorization.

21533414200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28237 (or 28228 counting only the distinct ones).

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

Adding to 21533414200 its reverse (241433512), we get a palindrome (21774847712).

The spelling of 21533414200 in words is "twenty-one billion, five hundred thirty-three million, four hundred fourteen thousand, two hundred".