20343400 has 96 divisors (see below), whose sum is σ = 59014080. Its totient is φ = 6336000.

The previous prime is 20343397. The next prime is 20343403. The reversal of 20343400 is 434302.

It is an interprime number because it is at equal distance from previous prime (20343397) and next prime (20343403).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20343403) 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, 14740 + ... + 16060.

It is an arithmetic number, because the mean of its divisors is an integer number (614730).

Almost surely, 2^20343400 is an apocalyptic number.

20343400 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 20343400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29507040).

20343400 is an abundant number, since it is smaller than the sum of its proper divisors (38670680).

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

20343400 is a wasteful number, since it uses less digits than its factorization.

20343400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355 (or 1346 counting only the distinct ones).

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

The square root of 20343400 is about 4510.3658388206. The cubic root of 20343400 is about 272.9865057041.

Adding to 20343400 its reverse (434302), we get a palindrome (20777702).

The spelling of 20343400 in words is "twenty million, three hundred forty-three thousand, four hundred".