21836700 has 108 divisors (see below), whose sum is σ = 72104760. Its totient is φ = 5512320.

The previous prime is 21836699. The next prime is 21836701. The reversal of 21836700 is 763812.

It is an interprime number because it is at equal distance from previous prime (21836699) and next prime (21836701).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21836701) 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, 16462 + ... + 17738.

Almost surely, 2^21836700 is an apocalyptic number.

21836700 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 21836700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36052380).

21836700 is an abundant number, since it is smaller than the sum of its proper divisors (50268060).

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

21836700 is a wasteful number, since it uses less digits than its factorization.

21836700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316 (or 1306 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 21836700 is about 4672.9754974748. The cubic root of 21836700 is about 279.5089181243.

The spelling of 21836700 in words is "twenty-one million, eight hundred thirty-six thousand, seven hundred".