20569941 has 24 divisors (see below), whose sum is σ = 34394880. Its totient is φ = 11602656.

The previous prime is 20569933. The next prime is 20569999. The reversal of 20569941 is 14996502.

20569941 is a `hidden beast` number, since 2 + 0 + 569 + 94 + 1 = 666.

It is not a de Polignac number, because 20569941 - 2³ = 20569933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20569896 and 20569905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20569441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2911 + ... + 7043.

It is an arithmetic number, because the mean of its divisors is an integer number (1433120).

Almost surely, 2^20569941 is an apocalyptic number.

20569941 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20569941 is a deficient number, since it is larger than the sum of its proper divisors (13824939).

20569941 is a wasteful number, since it uses less digits than its factorization.

20569941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4225 (or 4222 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 20569941 is about 4535.4096838103. The cubic root of 20569941 is about 273.9960794722.

The spelling of 20569941 in words is "twenty million, five hundred sixty-nine thousand, nine hundred forty-one".