20011203 has 6 divisors (see below), whose sum is σ = 28905084. Its totient is φ = 13340796.

The previous prime is 20011177. The next prime is 20011249. The reversal of 20011203 is 30211002.

It is a happy number.

It is not a de Polignac number, because 20011203 - 2⁵ = 20011171 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 2223467 = 20011203 / (2 + 0 + 0 + 1 + 1 + 2 + 0 + 3).

It is not an unprimeable number, because it can be changed into a prime (20011273) 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 5 ways as a sum of consecutive naturals, for example, 1111725 + ... + 1111742.

It is an arithmetic number, because the mean of its divisors is an integer number (4817514).

Almost surely, 2^20011203 is an apocalyptic number.

20011203 is a deficient number, since it is larger than the sum of its proper divisors (8893881).

20011203 is a wasteful number, since it uses less digits than its factorization.

20011203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223473 (or 2223470 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 20011203 is about 4473.3883131246. The cubic root of 20011203 is about 271.4924349001.

Adding to 20011203 its reverse (30211002), we get a palindrome (50222205).

The spelling of 20011203 in words is "twenty million, eleven thousand, two hundred three".