20008236 has 12 divisors (see below), whose sum is σ = 46685912. Its totient is φ = 6669408.

The previous prime is 20008223. The next prime is 20008243. The reversal of 20008236 is 63280002.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833665 + ... + 833688.

Almost surely, 2^20008236 is an apocalyptic number.

It is an amenable number.

20008236 is an abundant number, since it is smaller than the sum of its proper divisors (26677676).

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

20008236 is a wasteful number, since it uses less digits than its factorization.

20008236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667360 (or 1667358 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 20008236 is about 4473.0566730146. The cubic root of 20008236 is about 271.4790164519.

Adding to 20008236 its reverse (63280002), we get a palindrome (83288238).

The spelling of 20008236 in words is "twenty million, eight thousand, two hundred thirty-six".