20343300 has 144 divisors (see below), whose sum is σ = 64162560. Its totient is φ = 4959360.

The previous prime is 20343287. The next prime is 20343329. The reversal of 20343300 is 334302.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20343300.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 245059 + ... + 245141.

Almost surely, 2^20343300 is an apocalyptic number.

20343300 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 20343300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32081280).

20343300 is an abundant number, since it is smaller than the sum of its proper divisors (43819260).

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

20343300 is a wasteful number, since it uses less digits than its factorization.

20343300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 15.

The square root of 20343300 is about 4510.3547532317. The cubic root of 20343300 is about 272.9860584060.

Adding to 20343300 its reverse (334302), we get a palindrome (20677602).

The spelling of 20343300 in words is "twenty million, three hundred forty-three thousand, three hundred".