20761033 has 4 divisors (see below), whose sum is σ = 21322180. Its totient is φ = 20199888.

The previous prime is 20761021. The next prime is 20761043. The reversal of 20761033 is 33016702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33016702 = 2 ⋅16508351.

It can be written as a sum of positive squares in 2 ways, for example, as 19289664 + 1471369 = 4392^2 + 1213^2 .

It is a cyclic number.

It is not a de Polignac number, because 20761033 - 2¹³ = 20752841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20760995 and 20761013.

It is not an unprimeable number, because it can be changed into a prime (20761003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280518 + ... + 280591.

It is an arithmetic number, because the mean of its divisors is an integer number (5330545).

Almost surely, 2^20761033 is an apocalyptic number.

It is an amenable number.

20761033 is a deficient number, since it is larger than the sum of its proper divisors (561147).

20761033 is an equidigital number, since it uses as much as digits as its factorization.

20761033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561146.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 20761033 is about 4556.4276577161. The cubic root of 20761033 is about 274.8419278891.

Adding to 20761033 its reverse (33016702), we get a palindrome (53777735).

The spelling of 20761033 in words is "twenty million, seven hundred sixty-one thousand, thirty-three".