20490833 has 8 divisors (see below), whose sum is σ = 22874016. Its totient is φ = 18194400.

The previous prime is 20490823. The next prime is 20490839. The reversal of 20490833 is 33809402.

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

It is a cyclic number.

It is not a de Polignac number, because 20490833 - 2¹⁴ = 20474449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20490796 and 20490805.

It is not an unprimeable number, because it can be changed into a prime (20490839) 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 7 ways as a sum of consecutive naturals, for example, 21188 + ... + 22133.

It is an arithmetic number, because the mean of its divisors is an integer number (2859252).

Almost surely, 2^20490833 is an apocalyptic number.

It is an amenable number.

20490833 is a deficient number, since it is larger than the sum of its proper divisors (2383183).

20490833 is a wasteful number, since it uses less digits than its factorization.

20490833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43375.

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

The square root of 20490833 is about 4526.6801300733. The cubic root of 20490833 is about 273.6443829897.

The spelling of 20490833 in words is "twenty million, four hundred ninety thousand, eight hundred thirty-three".