20291203 has 4 divisors (see below), whose sum is σ = 20492208. Its totient is φ = 20090200.

The previous prime is 20291179. The next prime is 20291231. The reversal of 20291203 is 30219202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20291203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20291233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100351 + ... + 100552.

It is an arithmetic number, because the mean of its divisors is an integer number (5123052).

Almost surely, 2^20291203 is an apocalyptic number.

20291203 is a deficient number, since it is larger than the sum of its proper divisors (201005).

20291203 is a wasteful number, since it uses less digits than its factorization.

20291203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201004.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 20291203 is about 4504.5757846883. The cubic root of 20291203 is about 272.7528299046.

The spelling of 20291203 in words is "twenty million, two hundred ninety-one thousand, two hundred three".