20875533 has 8 divisors (see below), whose sum is σ = 31810368. Its totient is φ = 11928864.

The previous prime is 20875531. The next prime is 20875549. The reversal of 20875533 is 33557802.

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

It is not a de Polignac number, because 20875533 - 2¹ = 20875531 is a prime.

It is a super-3 number, since 3×20875533³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20875494 and 20875503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20875531) 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, 497016 + ... + 497057.

It is an arithmetic number, because the mean of its divisors is an integer number (3976296).

Almost surely, 2^20875533 is an apocalyptic number.

It is an amenable number.

20875533 is a deficient number, since it is larger than the sum of its proper divisors (10934835).

20875533 is an equidigital number, since it uses as much as digits as its factorization.

20875533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994083.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 20875533 is about 4568.9750491768. The cubic root of 20875533 is about 275.3462657455.

The spelling of 20875533 in words is "twenty million, eight hundred seventy-five thousand, five hundred thirty-three".