20010120203 has 4 divisors (see below), whose sum is σ = 20216410200. Its totient is φ = 19803830208.

The previous prime is 20010120187. The next prime is 20010120211. The reversal of 20010120203 is 30202101002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20010120203 - 2⁴ = 20010120187 is a prime.

It is a super-2 number, since 2×20010120203² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20010120253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103144853 + ... + 103145046.

It is an arithmetic number, because the mean of its divisors is an integer number (5054102550).

Almost surely, 2^20010120203 is an apocalyptic number.

20010120203 is a deficient number, since it is larger than the sum of its proper divisors (206289997).

20010120203 is an equidigital number, since it uses as much as digits as its factorization.

20010120203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206289996.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20010120203 its reverse (30202101002), we get a palindrome (50212221205).

The spelling of 20010120203 in words is "twenty billion, ten million, one hundred twenty thousand, two hundred three".