21364300 has 72 divisors (see below), whose sum is σ = 49215600. Its totient is φ = 8037120.

The previous prime is 21364267. The next prime is 21364307. The reversal of 21364300 is 346312.

It is not an unprimeable number, because it can be changed into a prime (21364307) 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, 153631 + ... + 153769.

It is an arithmetic number, because the mean of its divisors is an integer number (683550).

Almost surely, 2^21364300 is an apocalyptic number.

21364300 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 21364300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24607800).

21364300 is an abundant number, since it is smaller than the sum of its proper divisors (27851300).

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

21364300 is a wasteful number, since it uses less digits than its factorization.

21364300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 21364300 is about 4622.1531779031. The cubic root of 21364300 is about 277.4786391587.

The spelling of 21364300 in words is "twenty-one million, three hundred sixty-four thousand, three hundred".