21082300 has 18 divisors (see below), whose sum is σ = 45748808. Its totient is φ = 8432880.

The previous prime is 21082291. The next prime is 21082301. The reversal of 21082300 is 328012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21082301) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 105312 + ... + 105511.

Almost surely, 2^21082300 is an apocalyptic number.

21082300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21082300 is an abundant number, since it is smaller than the sum of its proper divisors (24666508).

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

21082300 is a wasteful number, since it uses less digits than its factorization.

21082300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210837 (or 210830 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 21082300 is about 4591.5465804019. The cubic root of 21082300 is about 276.2523596776.

The spelling of 21082300 in words is "twenty-one million, eighty-two thousand, three hundred".