20622800 has 120 divisors (see below), whose sum is σ = 55814880. Its totient is φ = 7257600.

The previous prime is 20622793. The next prime is 20622803. The reversal of 20622800 is 822602.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20622803) 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 23 ways as a sum of consecutive naturals, for example, 189146 + ... + 189254.

It is an arithmetic number, because the mean of its divisors is an integer number (465124).

Almost surely, 2^20622800 is an apocalyptic number.

20622800 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 20622800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27907440).

20622800 is an abundant number, since it is smaller than the sum of its proper divisors (35192080).

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

20622800 is a wasteful number, since it uses less digits than its factorization.

20622800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20622800 is about 4541.2333126586. The cubic root of 20622800 is about 274.2305765077.

The spelling of 20622800 in words is "twenty million, six hundred twenty-two thousand, eight hundred".