20195533 has 4 divisors (see below), whose sum is σ = 20226748. Its totient is φ = 20164320.

The previous prime is 20195521. The next prime is 20195543. The reversal of 20195533 is 33559102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33559102 = 2 ⋅16779551.

It can be written as a sum of positive squares in 2 ways, for example, as 9872164 + 10323369 = 3142^2 + 3213^2 .

It is a cyclic number.

It is not a de Polignac number, because 20195533 - 2¹⁷ = 20064461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20195503) 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, 14616 + ... + 15937.

It is an arithmetic number, because the mean of its divisors is an integer number (5056687).

Almost surely, 2^20195533 is an apocalyptic number.

It is an amenable number.

20195533 is a deficient number, since it is larger than the sum of its proper divisors (31215).

20195533 is an equidigital number, since it uses as much as digits as its factorization.

20195533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31214.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 20195533 is about 4493.9440361446. The cubic root of 20195533 is about 272.3234914505.

The spelling of 20195533 in words is "twenty million, one hundred ninety-five thousand, five hundred thirty-three".