20453033 has 4 divisors (see below), whose sum is σ = 21158340. Its totient is φ = 19747728.

The previous prime is 20453029. The next prime is 20453039. The reversal of 20453033 is 33035402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33035402 = 2 ⋅16517701.

It can be written as a sum of positive squares in 2 ways, for example, as 5607424 + 14845609 = 2368^2 + 3853^2 .

It is a cyclic number.

It is not a de Polignac number, because 20453033 - 2² = 20453029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20452996 and 20453014.

It is not an unprimeable number, because it can be changed into a prime (20453039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352610 + ... + 352667.

It is an arithmetic number, because the mean of its divisors is an integer number (5289585).

Almost surely, 2^20453033 is an apocalyptic number.

It is an amenable number.

20453033 is a deficient number, since it is larger than the sum of its proper divisors (705307).

20453033 is an equidigital number, since it uses as much as digits as its factorization.

20453033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705306.

The product of its (nonzero) digits is 1080, while the sum is 20.

The square root of 20453033 is about 4522.5029574341. The cubic root of 20453033 is about 273.4760129894.

Adding to 20453033 its reverse (33035402), we get a palindrome (53488435).

The spelling of 20453033 in words is "twenty million, four hundred fifty-three thousand, thirty-three".