20803842 has 24 divisors (see below), whose sum is σ = 46294716. Its totient is φ = 6746976.

The previous prime is 20803831. The next prime is 20803847. The reversal of 20803842 is 24830802.

It can be written as a sum of positive squares in 2 ways, for example, as 16966161 + 3837681 = 4119^2 + 1959^2 .

It is not an unprimeable number, because it can be changed into a prime (20803847) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 14953 + ... + 16284.

Almost surely, 2^20803842 is an apocalyptic number.

20803842 is an abundant number, since it is smaller than the sum of its proper divisors (25490874).

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

20803842 is a wasteful number, since it uses less digits than its factorization.

20803842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31282 (or 31279 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 20803842 is about 4561.1228880617. The cubic root of 20803842 is about 275.0307051114.

The spelling of 20803842 in words is "twenty million, eight hundred three thousand, eight hundred forty-two".