20061823 has 4 divisors (see below), whose sum is σ = 20753640. Its totient is φ = 19370008.

The previous prime is 20061799. The next prime is 20061827. The reversal of 20061823 is 32816002.

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

It is a cyclic number.

It is not a de Polignac number, because 20061823 - 2⁹ = 20061311 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20061794 and 20061803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20061827) 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, 345865 + ... + 345922.

It is an arithmetic number, because the mean of its divisors is an integer number (5188410).

Almost surely, 2^20061823 is an apocalyptic number.

20061823 is a deficient number, since it is larger than the sum of its proper divisors (691817).

20061823 is an equidigital number, since it uses as much as digits as its factorization.

20061823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691816.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20061823 is about 4479.0426432442. The cubic root of 20061823 is about 271.7211630336.

Adding to 20061823 its reverse (32816002), we get a palindrome (52877825).

The spelling of 20061823 in words is "twenty million, sixty-one thousand, eight hundred twenty-three".