20656041 has 16 divisors (see below), whose sum is σ = 31641984. Its totient is φ = 11741184.

The previous prime is 20655997. The next prime is 20656057. The reversal of 20656041 is 14065602.

It is not a de Polignac number, because 20656041 - 2⁹ = 20655529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20656081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1641 + ... + 6633.

It is an arithmetic number, because the mean of its divisors is an integer number (1977624).

Almost surely, 2^20656041 is an apocalyptic number.

20656041 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20656041 is a deficient number, since it is larger than the sum of its proper divisors (10985943).

20656041 is a wasteful number, since it uses less digits than its factorization.

20656041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5200.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20656041 is about 4544.8917478858. The cubic root of 20656041 is about 274.3778375528.

The spelling of 20656041 in words is "twenty million, six hundred fifty-six thousand, forty-one".