20722533 has 8 divisors (see below), whose sum is σ = 29755488. Its totient is φ = 12752304.

The previous prime is 20722519. The next prime is 20722543. The reversal of 20722533 is 33522702.

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

It is not a de Polignac number, because 20722533 - 2⁸ = 20722277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20722543) 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 7 ways as a sum of consecutive naturals, for example, 265635 + ... + 265712.

It is an arithmetic number, because the mean of its divisors is an integer number (3719436).

Almost surely, 2^20722533 is an apocalyptic number.

It is an amenable number.

20722533 is a deficient number, since it is larger than the sum of its proper divisors (9032955).

20722533 is a wasteful number, since it uses less digits than its factorization.

20722533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531363.

The product of its (nonzero) digits is 2520, while the sum is 24.

The square root of 20722533 is about 4552.2008962698. The cubic root of 20722533 is about 274.6719305385.

The spelling of 20722533 in words is "twenty million, seven hundred twenty-two thousand, five hundred thirty-three".