20499200 has 54 divisors (see below), whose sum is σ = 50754564. Its totient is φ = 8197120.

The previous prime is 20499179. The next prime is 20499209. The reversal of 20499200 is 299402.

It is a self number, because there is not a number n which added to its sum of digits gives 20499200.

It is not an unprimeable number, because it can be changed into a prime (20499209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4799 + ... + 8001.

Almost surely, 2^20499200 is an apocalyptic number.

20499200 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 20499200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25377282).

20499200 is an abundant number, since it is smaller than the sum of its proper divisors (30255364).

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

20499200 is an equidigital number, since it uses as much as digits as its factorization.

20499200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3229 (or 3210 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 20499200 is about 4527.6042229859. The cubic root of 20499200 is about 273.6816235611.

The spelling of 20499200 in words is "twenty million, four hundred ninety-nine thousand, two hundred".