20433400 has 96 divisors (see below), whose sum is σ = 53121600. Its totient is φ = 7257600.

The previous prime is 20433397. The next prime is 20433403. The reversal of 20433400 is 433402.

It is an interprime number because it is at equal distance from previous prime (20433397) and next prime (20433403).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20433403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75265 + ... + 75535.

It is an arithmetic number, because the mean of its divisors is an integer number (553350).

Almost surely, 2^20433400 is an apocalyptic number.

20433400 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 20433400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26560800).

20433400 is an abundant number, since it is smaller than the sum of its proper divisors (32688200).

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

20433400 is a wasteful number, since it uses less digits than its factorization.

20433400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 20433400 is about 4520.3318462255. The cubic root of 20433400 is about 273.3884811722.

Adding to 20433400 its reverse (433402), we get a palindrome (20866802).

The spelling of 20433400 in words is "twenty million, four hundred thirty-three thousand, four hundred".