20404200 has 96 divisors (see below), whose sum is σ = 65352960. Its totient is φ = 5260800.

The previous prime is 20404187. The next prime is 20404213. The reversal of 20404200 is 240402.

It is an interprime number because it is at equal distance from previous prime (20404187) and next prime (20404213).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18052 + ... + 19148.

It is an arithmetic number, because the mean of its divisors is an integer number (680760).

Almost surely, 2^20404200 is an apocalyptic number.

20404200 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 20404200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32676480).

20404200 is an abundant number, since it is smaller than the sum of its proper divisors (44948760).

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

20404200 is a wasteful number, since it uses less digits than its factorization.

20404200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147 (or 1138 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 20404200 is about 4517.1008401407. The cubic root of 20404200 is about 273.2581920491.

Adding to 20404200 its reverse (240402), we get a palindrome (20644602).

The spelling of 20404200 in words is "twenty million, four hundred four thousand, two hundred".