20421203033 has 24 divisors (see below), whose sum is σ = 25680023040. Its totient is φ = 15895915200.

The previous prime is 20421203017. The next prime is 20421203071. The reversal of 20421203033 is 33030212402.

It is not a de Polignac number, because 20421203033 - 2⁴ = 20421203017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20421202996 and 20421203014.

It is not an unprimeable number, because it can be changed into a prime (20421206033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 827213 + ... + 851541.

It is an arithmetic number, because the mean of its divisors is an integer number (1070000960).

Almost surely, 2^20421203033 is an apocalyptic number.

It is an amenable number.

20421203033 is a deficient number, since it is larger than the sum of its proper divisors (5258820007).

20421203033 is a wasteful number, since it uses less digits than its factorization.

20421203033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25349 (or 25338 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 20421203033 its reverse (33030212402), we get a palindrome (53451415435).

The spelling of 20421203033 in words is "twenty billion, four hundred twenty-one million, two hundred three thousand, thirty-three".