20923533 has 12 divisors (see below), whose sum is σ = 30264000. Its totient is φ = 13930056.

The previous prime is 20923517. The next prime is 20923559. The reversal of 20923533 is 33532902.

It is not a de Polignac number, because 20923533 - 2⁴ = 20923517 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20923497 and 20923506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20923033) 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 11 ways as a sum of consecutive naturals, for example, 9468 + ... + 11466.

It is an arithmetic number, because the mean of its divisors is an integer number (2522000).

Almost surely, 2^20923533 is an apocalyptic number.

It is an amenable number.

20923533 is a deficient number, since it is larger than the sum of its proper divisors (9340467).

20923533 is a wasteful number, since it uses less digits than its factorization.

20923533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3168 (or 3165 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 27.

The square root of 20923533 is about 4574.2248523657. The cubic root of 20923533 is about 275.5571426579.

It can be divided in two parts, 2092 and 3533, that added together give a square (5625 = 75²).

The spelling of 20923533 in words is "twenty million, nine hundred twenty-three thousand, five hundred thirty-three".