20409833 has 2 divisors, whose sum is σ = 20409834. Its totient is φ = 20409832.

The previous prime is 20409827. The next prime is 20409839. The reversal of 20409833 is 33890402.

It is a balanced prime because it is at equal distance from previous prime (20409827) and next prime (20409839).

It can be written as a sum of positive squares in only one way, i.e., 20187049 + 222784 = 4493^2 + 472^2 .

It is a cyclic number.

It is not a de Polignac number, because 20409833 - 2⁶ = 20409769 is a prime.

It is a super-2 number, since 2×20409833² = 833122566175778, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20409796 and 20409805.

It is not a weakly prime, because it can be changed into another prime (20409839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10204916 + 10204917.

It is an arithmetic number, because the mean of its divisors is an integer number (10204917).

Almost surely, 2^20409833 is an apocalyptic number.

It is an amenable number.

20409833 is a deficient number, since it is larger than the sum of its proper divisors (1).

20409833 is an equidigital number, since it uses as much as digits as its factorization.

20409833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20409833 is about 4517.7243165116. The cubic root of 20409833 is about 273.2833359209.

The spelling of 20409833 in words is "twenty million, four hundred nine thousand, eight hundred thirty-three".