20023816 has 16 divisors (see below), whose sum is σ = 37592640. Its totient is φ = 9999120.

The previous prime is 20023813. The next prime is 20023819. The reversal of 20023816 is 61832002.

It is an interprime number because it is at equal distance from previous prime (20023813) and next prime (20023819).

It is not an unprimeable number, because it can be changed into a prime (20023813) 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, 10021 + ... + 11851.

It is an arithmetic number, because the mean of its divisors is an integer number (2349540).

Almost surely, 2^20023816 is an apocalyptic number.

It is an amenable number.

20023816 is a deficient number, since it is larger than the sum of its proper divisors (17568824).

20023816 is a wasteful number, since it uses less digits than its factorization.

20023816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3204 (or 3200 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20023816 is about 4474.7978725301. The cubic root of 20023816 is about 271.5494632037.

Adding to 20023816 its reverse (61832002), we get a palindrome (81855818).

The spelling of 20023816 in words is "twenty million, twenty-three thousand, eight hundred sixteen".