20723200 has 60 divisors (see below), whose sum is σ = 51375060. Its totient is φ = 8284160.

The previous prime is 20723173. The next prime is 20723231. The reversal of 20723200 is 232702.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

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, 11991 + ... + 13609.

It is an arithmetic number, because the mean of its divisors is an integer number (856251).

Almost surely, 2^20723200 is an apocalyptic number.

20723200 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 20723200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25687530).

20723200 is an abundant number, since it is smaller than the sum of its proper divisors (30651860).

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

20723200 is an equidigital number, since it uses as much as digits as its factorization.

20723200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647 (or 1626 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 20723200 is about 4552.2741569462. The cubic root of 20723200 is about 274.6748774789.

Adding to 20723200 its reverse (232702), we get a palindrome (20955902).

The spelling of 20723200 in words is "twenty million, seven hundred twenty-three thousand, two hundred".