20862800 has 60 divisors (see below), whose sum is σ = 57290976. Its totient is φ = 7152000.

The previous prime is 20862781. The next prime is 20862841. The reversal of 20862800 is 826802.

It is a self number, because there is not a number n which added to its sum of digits gives 20862800.

It is a congruent number.

It is an unprimeable number.

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, 926 + ... + 6525.

Almost surely, 2^20862800 is an apocalyptic number.

20862800 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 20862800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28645488).

20862800 is an abundant number, since it is smaller than the sum of its proper divisors (36428176).

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

20862800 is a wasteful number, since it uses less digits than its factorization.

20862800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7476 (or 7465 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 20862800 is about 4567.5814168989. The cubic root of 20862800 is about 275.2902720124.

The spelling of 20862800 in words is "twenty million, eight hundred sixty-two thousand, eight hundred".