21059200 has 48 divisors (see below), whose sum is σ = 52030710. Its totient is φ = 8422400.

The previous prime is 21059197. The next prime is 21059219. The reversal of 21059200 is 295012.

It can be written as a sum of positive squares in 3 ways, for example, as 12902464 + 8156736 = 3592^2 + 2856^2 .

It is a zygodrome in base 4.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 91 + ... + 6490.

Almost surely, 2^21059200 is an apocalyptic number.

21059200 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 21059200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26015355).

21059200 is an abundant number, since it is smaller than the sum of its proper divisors (30971510).

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

21059200 is an equidigital number, since it uses as much as digits as its factorization.

21059200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6605 (or 6588 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 21059200 is about 4589.0303986790. The cubic root of 21059200 is about 276.1514256927.

The spelling of 21059200 in words is "twenty-one million, fifty-nine thousand, two hundred".