20002236 has 12 divisors (see below), whose sum is σ = 46671912. Its totient is φ = 6667408.

The previous prime is 20002201. The next prime is 20002261. The reversal of 20002236 is 63220002.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833415 + ... + 833438.

It is an arithmetic number, because the mean of its divisors is an integer number (3889326).

Almost surely, 2^20002236 is an apocalyptic number.

It is an amenable number.

20002236 is an abundant number, since it is smaller than the sum of its proper divisors (26669676).

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

20002236 is a wasteful number, since it uses less digits than its factorization.

20002236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666860 (or 1666858 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 20002236 is about 4472.3859404126. The cubic root of 20002236 is about 271.4518770122.

Adding to 20002236 its reverse (63220002), we get a palindrome (83222238).

The spelling of 20002236 in words is "twenty million, two thousand, two hundred thirty-six".