20994533 has 8 divisors (see below), whose sum is σ = 24768000. Its totient is φ = 17414640.

The previous prime is 20994527. The next prime is 20994569. The reversal of 20994533 is 33549902.

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 20994533 - 2¹⁸ = 20732389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20994493 and 20994502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20994433) 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 7 ways as a sum of consecutive naturals, for example, 48158 + ... + 48591.

It is an arithmetic number, because the mean of its divisors is an integer number (3096000).

Almost surely, 2^20994533 is an apocalyptic number.

It is an amenable number.

20994533 is a deficient number, since it is larger than the sum of its proper divisors (3773467).

20994533 is an equidigital number, since it uses as much as digits as its factorization.

20994533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96787.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 20994533 is about 4581.9791575257. The cubic root of 20994533 is about 275.8684742293.

The spelling of 20994533 in words is "twenty million, nine hundred ninety-four thousand, five hundred thirty-three".