20043550 has 12 divisors (see below), whose sum is σ = 37281096. Its totient is φ = 8017400.

The previous prime is 20043469. The next prime is 20043559. The reversal of 20043550 is 5534002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20043559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 200386 + ... + 200485.

It is an arithmetic number, because the mean of its divisors is an integer number (3106758).

Almost surely, 2^20043550 is an apocalyptic number.

20043550 is a deficient number, since it is larger than the sum of its proper divisors (17237546).

20043550 is a wasteful number, since it uses less digits than its factorization.

20043550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400883 (or 400878 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 20043550 is about 4477.0023453199. The cubic root of 20043550 is about 271.6386403062.

Adding to 20043550 its reverse (5534002), we get a palindrome (25577552).

The spelling of 20043550 in words is "twenty million, forty-three thousand, five hundred fifty".