20841936 has 40 divisors (see below), whose sum is σ = 56677920. Its totient is φ = 6581376.

The previous prime is 20841913. The next prime is 20841937. The reversal of 20841936 is 63914802.

It is a junction number, because it is equal to n+sod(n) for n = 20841897 and 20841906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20841937) 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 7 ways as a sum of consecutive naturals, for example, 10515 + ... + 12338.

It is an arithmetic number, because the mean of its divisors is an integer number (1416948).

Almost surely, 2^20841936 is an apocalyptic number.

It is an amenable number.

20841936 is an abundant number, since it is smaller than the sum of its proper divisors (35835984).

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

20841936 is a wasteful number, since it uses less digits than its factorization.

20841936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22883 (or 22877 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 20841936 is about 4565.2969235308. The cubic root of 20841936 is about 275.1984727020.

The spelling of 20841936 in words is "twenty million, eight hundred forty-one thousand, nine hundred thirty-six".