20021033 has 8 divisors (see below), whose sum is σ = 20618952. Its totient is φ = 19426176.

The previous prime is 20021021. The next prime is 20021059. The reversal of 20021033 is 33012002.

It can be written as a sum of positive squares in 4 ways, for example, as 4631104 + 15389929 = 2152^2 + 3923^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20021033 - 2¹⁶ = 19955497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021093) 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, 22391 + ... + 23267.

It is an arithmetic number, because the mean of its divisors is an integer number (2577369).

Almost surely, 2^20021033 is an apocalyptic number.

It is an amenable number.

20021033 is a deficient number, since it is larger than the sum of its proper divisors (597919).

20021033 is an equidigital number, since it uses as much as digits as its factorization.

20021033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 20021033 is about 4474.4868979582. The cubic root of 20021033 is about 271.5368822323.

Adding to 20021033 its reverse (33012002), we get a palindrome (53033035).

The spelling of 20021033 in words is "twenty million, twenty-one thousand, thirty-three".