20540833 has 8 divisors (see below), whose sum is σ = 21111552. Its totient is φ = 19975776.

The previous prime is 20540831. The next prime is 20540837. The reversal of 20540833 is 33804502.

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 20540833 - 2¹ = 20540831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20540798 and 20540807.

It is not an unprimeable number, because it can be changed into a prime (20540831) 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 7 ways as a sum of consecutive naturals, for example, 6541 + ... + 9157.

It is an arithmetic number, because the mean of its divisors is an integer number (2638944).

Almost surely, 2^20540833 is an apocalyptic number.

20540833 is the 2617-th octagonal number.

It is an amenable number.

20540833 is a deficient number, since it is larger than the sum of its proper divisors (570719).

20540833 is a wasteful number, since it uses less digits than its factorization.

20540833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2831.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20540833 is about 4532.1995763647. The cubic root of 20540833 is about 273.8667768358.

The spelling of 20540833 in words is "twenty million, five hundred forty thousand, eight hundred thirty-three".