20423200 has 108 divisors (see below), whose sum is σ = 58109562. Its totient is φ = 6988800.

The previous prime is 20423177. The next prime is 20423201. The reversal of 20423200 is 232402.

20423200 is nontrivially palindromic in base 9.

It can be written as a sum of positive squares in 3 ways, for example, as 13046544 + 7376656 = 3612^2 + 2716^2 .

It is not an unprimeable number, because it can be changed into a prime (20423201) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 38940 + ... + 39460.

Almost surely, 2^20423200 is an apocalyptic number.

20423200 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 20423200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29054781).

20423200 is an abundant number, since it is smaller than the sum of its proper divisors (37686362).

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

20423200 is a wasteful number, since it uses less digits than its factorization.

20423200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 20423200 is about 4519.2034696393. The cubic root of 20423200 is about 273.3429833330.

Adding to 20423200 its reverse (232402), we get a palindrome (20655602).

The spelling of 20423200 in words is "twenty million, four hundred twenty-three thousand, two hundred".