20021012203 has 4 divisors (see below), whose sum is σ = 20106939528. Its totient is φ = 19935084880.

The previous prime is 20021012189. The next prime is 20021012227. The reversal of 20021012203 is 30221012002.

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 20021012203 - 2⁵ = 20021012171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021012233) 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, 42963313 + ... + 42963778.

It is an arithmetic number, because the mean of its divisors is an integer number (5026734882).

Almost surely, 2^20021012203 is an apocalyptic number.

20021012203 is a deficient number, since it is larger than the sum of its proper divisors (85927325).

20021012203 is an equidigital number, since it uses as much as digits as its factorization.

20021012203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85927324.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20021012203 its reverse (30221012002), we get a palindrome (50242024205).

The spelling of 20021012203 in words is "twenty billion, twenty-one million, twelve thousand, two hundred three".