20826733 has 4 divisors (see below), whose sum is σ = 20898108. Its totient is φ = 20755360.

The previous prime is 20826697. The next prime is 20826791. The reversal of 20826733 is 33762802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18507204 + 2319529 = 4302^2 + 1523^2 .

It is a cyclic number.

It is not a de Polignac number, because 20826733 - 2¹³ = 20818541 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20826695 and 20826704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20826133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35248 + ... + 35833.

It is an arithmetic number, because the mean of its divisors is an integer number (5224527).

Almost surely, 2^20826733 is an apocalyptic number.

It is an amenable number.

20826733 is a deficient number, since it is larger than the sum of its proper divisors (71375).

20826733 is an equidigital number, since it uses as much as digits as its factorization.

20826733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71374.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 20826733 is about 4563.6315583097. The cubic root of 20826733 is about 275.1315425780.

The spelling of 20826733 in words is "twenty million, eight hundred twenty-six thousand, seven hundred thirty-three".