20001033 has 16 divisors (see below), whose sum is σ = 31911040. Its totient is φ = 12308112.

The previous prime is 20001031. The next prime is 20001067. The reversal of 20001033 is 33010002.

It is a happy number.

It is not a de Polignac number, because 20001033 - 2¹ = 20001031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28141 + ... + 28842.

It is an arithmetic number, because the mean of its divisors is an integer number (1994440).

Almost surely, 2^20001033 is an apocalyptic number.

It is an amenable number.

20001033 is a deficient number, since it is larger than the sum of its proper divisors (11910007).

20001033 is a wasteful number, since it uses less digits than its factorization.

20001033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57005 (or 56999 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 9.

The square root of 20001033 is about 4472.2514464194. The cubic root of 20001033 is about 271.4464349014.

Adding to 20001033 its reverse (33010002), we get a palindrome (53011035).

The spelling of 20001033 in words is "twenty million, one thousand, thirty-three".