20803836 has 12 divisors (see below), whose sum is σ = 48542312. Its totient is φ = 6934608.

The previous prime is 20803831. The next prime is 20803847. The reversal of 20803836 is 63830802.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20803831) 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, 866815 + ... + 866838.

Almost surely, 2^20803836 is an apocalyptic number.

It is an amenable number.

20803836 is an abundant number, since it is smaller than the sum of its proper divisors (27738476).

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

20803836 is a wasteful number, since it uses less digits than its factorization.

20803836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733660 (or 1733658 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 20803836 is about 4561.1222303288. The cubic root of 20803836 is about 275.0306786711.

The spelling of 20803836 in words is "twenty million, eight hundred three thousand, eight hundred thirty-six".