21141300 has 72 divisors (see below), whose sum is σ = 64405600. Its totient is φ = 5339520.

The previous prime is 21141299. The next prime is 21141317. The reversal of 21141300 is 314112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3846 + ... + 7554.

Almost surely, 2^21141300 is an apocalyptic number.

21141300 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 21141300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32202800).

21141300 is an abundant number, since it is smaller than the sum of its proper divisors (43264300).

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

21141300 is a wasteful number, since it uses less digits than its factorization.

21141300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3745 (or 3738 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 21141300 is about 4597.9669420299. The cubic root of 21141300 is about 276.5098222310.

Adding to 21141300 its reverse (314112), we get a palindrome (21455412).

The spelling of 21141300 in words is "twenty-one million, one hundred forty-one thousand, three hundred".