21023203234203 has 48 divisors (see below), whose sum is σ = 31406937802240. Its totient is φ = 13542823449792.

The previous prime is 21023203234147. The next prime is 21023203234237. The reversal of 21023203234203 is 30243230232012.

21023203234203 is a `hidden beast` number, since 2 + 1 + 0 + 23 + 203 + 234 + 203 = 666.

It is not a de Polignac number, because 21023203234203 - 2³³ = 21014613299611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21023203234303) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26736126 + ... + 27511212.

Almost surely, 2^{21023203234203} is an apocalyptic number.

21023203234203 is a deficient number, since it is larger than the sum of its proper divisors (10383734568037).

21023203234203 is a wasteful number, since it uses less digits than its factorization.

21023203234203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775888 (or 775885 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 21023203234203 its reverse (30243230232012), we get a palindrome (51266433466215).

The spelling of 21023203234203 in words is "twenty-one trillion, twenty-three billion, two hundred three million, two hundred thirty-four thousand, two hundred three".