20955201 has 16 divisors (see below), whose sum is σ = 28534464. Its totient is φ = 13676544.

The previous prime is 20955199. The next prime is 20955227. The reversal of 20955201 is 10255902.

It is not a de Polignac number, because 20955201 - 2¹ = 20955199 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20955241) 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 15 ways as a sum of consecutive naturals, for example, 30801 + ... + 31473.

It is an arithmetic number, because the mean of its divisors is an integer number (1783404).

Almost surely, 2^20955201 is an apocalyptic number.

It is an amenable number.

20955201 is a deficient number, since it is larger than the sum of its proper divisors (7579263).

20955201 is a wasteful number, since it uses less digits than its factorization.

20955201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 20955201 is about 4577.6851136792. The cubic root of 20955201 is about 275.6960921814.

The spelling of 20955201 in words is "twenty million, nine hundred fifty-five thousand, two hundred one".