20363400 has 144 divisors (see below), whose sum is σ = 71089200. Its totient is φ = 5417280.

The previous prime is 20363389. The next prime is 20363419. The reversal of 20363400 is 436302.

20363400 is a `hidden beast` number, since 203 + 63 + 400 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 48391 + ... + 48809.

It is an arithmetic number, because the mean of its divisors is an integer number (493675).

Almost surely, 2^20363400 is an apocalyptic number.

20363400 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 20363400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35544600).

20363400 is an abundant number, since it is smaller than the sum of its proper divisors (50725800).

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

20363400 is a wasteful number, since it uses less digits than its factorization.

20363400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 20363400 is about 4512.5824092198. The cubic root of 20363400 is about 273.0759358862.

Adding to 20363400 its reverse (436302), we get a palindrome (20799702).

The spelling of 20363400 in words is "twenty million, three hundred sixty-three thousand, four hundred".