20243816 has 16 divisors (see below), whose sum is σ = 39955200. Its totient is φ = 9589104.

The previous prime is 20243809. The next prime is 20243819. The reversal of 20243816 is 61834202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20243819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66440 + ... + 66743.

It is an arithmetic number, because the mean of its divisors is an integer number (2497200).

Almost surely, 2^20243816 is an apocalyptic number.

It is an amenable number.

20243816 is a deficient number, since it is larger than the sum of its proper divisors (19711384).

20243816 is a wasteful number, since it uses less digits than its factorization.

20243816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133208 (or 133204 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 20243816 is about 4499.3128364229. The cubic root of 20243816 is about 272.5403402389.

The spelling of 20243816 in words is "twenty million, two hundred forty-three thousand, eight hundred sixteen".