21868300 has 36 divisors (see below), whose sum is σ = 47661880. Its totient is φ = 8709120.

The previous prime is 21868289. The next prime is 21868303. The reversal of 21868300 is 386812.

It is not an unprimeable number, because it can be changed into a prime (21868303) 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 11 ways as a sum of consecutive naturals, for example, 37612 + ... + 38188.

Almost surely, 2^21868300 is an apocalyptic number.

21868300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21868300 is an abundant number, since it is smaller than the sum of its proper divisors (25793580).

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

21868300 is a wasteful number, since it uses less digits than its factorization.

21868300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970 (or 963 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 21868300 is about 4676.3554184856. The cubic root of 21868300 is about 279.6436794012.

The spelling of 21868300 in words is "twenty-one million, eight hundred sixty-eight thousand, three hundred".