20746533 has 16 divisors (see below), whose sum is σ = 29256192. Its totient is φ = 13056000.

The previous prime is 20746519. The next prime is 20746541. The reversal of 20746533 is 33564702.

It is not a de Polignac number, because 20746533 - 2⁵ = 20746501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20746533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20746543) 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 15 ways as a sum of consecutive naturals, for example, 1093 + ... + 6533.

It is an arithmetic number, because the mean of its divisors is an integer number (1828512).

Almost surely, 2^20746533 is an apocalyptic number.

It is an amenable number.

20746533 is a deficient number, since it is larger than the sum of its proper divisors (8509659).

20746533 is a wasteful number, since it uses less digits than its factorization.

20746533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5516.

The product of its (nonzero) digits is 15120, while the sum is 30.

The square root of 20746533 is about 4554.8362209853. The cubic root of 20746533 is about 274.7779276039. Note that the first 3 decimals are identical.

The spelling of 20746533 in words is "twenty million, seven hundred forty-six thousand, five hundred thirty-three".