21412300 has 108 divisors (see below), whose sum is σ = 57819216. Its totient is φ = 6739200.

The previous prime is 21412277. The next prime is 21412301. The reversal of 21412300 is 321412.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (21412301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 118210 + ... + 118390.

Almost surely, 2^21412300 is an apocalyptic number.

21412300 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 21412300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28909608).

21412300 is an abundant number, since it is smaller than the sum of its proper divisors (36406916).

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

21412300 is a wasteful number, since it uses less digits than its factorization.

21412300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 21412300 is about 4627.3426499450. The cubic root of 21412300 is about 277.6862910571.

Adding to 21412300 its reverse (321412), we get a palindrome (21733712).

It can be divided in two parts, 21412 and 300, that added together give a palindrome (21712).

The spelling of 21412300 in words is "twenty-one million, four hundred twelve thousand, three hundred".