20001021203 has 8 divisors (see below), whose sum is σ = 21249835488. Its totient is φ = 18760238464.

The previous prime is 20001021193. The next prime is 20001021211. The reversal of 20001021203 is 30212010002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20001021203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001021233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2002751 + ... + 2012712.

It is an arithmetic number, because the mean of its divisors is an integer number (2656229436).

Almost surely, 2^20001021203 is an apocalyptic number.

20001021203 is a deficient number, since it is larger than the sum of its proper divisors (1248814285).

20001021203 is a wasteful number, since it uses less digits than its factorization.

20001021203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4015773.

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

Adding to 20001021203 its reverse (30212010002), we get a palindrome (50213031205).

The spelling of 20001021203 in words is "twenty billion, one million, twenty-one thousand, two hundred three".