20043700 has 18 divisors (see below), whose sum is σ = 43495046. Its totient is φ = 8017440.

The previous prime is 20043691. The next prime is 20043713. The reversal of 20043700 is 734002.

It can be written as a sum of positive squares in 3 ways, for example, as 5588496 + 14455204 = 2364^2 + 3802^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100119 + ... + 100318.

Almost surely, 2^20043700 is an apocalyptic number.

20043700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20043700 is an abundant number, since it is smaller than the sum of its proper divisors (23451346).

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

20043700 is a wasteful number, since it uses less digits than its factorization.

20043700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200451 (or 200444 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 20043700 is about 4477.0190975693. The cubic root of 20043700 is about 271.6393179255.

Adding to 20043700 its reverse (734002), we get a palindrome (20777702).

The spelling of 20043700 in words is "twenty million, forty-three thousand, seven hundred".