20207823 has 8 divisors (see below), whose sum is σ = 28115328. Its totient is φ = 12886104.

The previous prime is 20207819. The next prime is 20207833. The reversal of 20207823 is 32870202.

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

It is not a de Polignac number, because 20207823 - 2² = 20207819 is a prime.

It is a super-2 number, since 2×20207823² = 816712220798658, which contains 22 as substring.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 20207793 and 20207802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20207813) 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, 146365 + ... + 146502.

It is an arithmetic number, because the mean of its divisors is an integer number (3514416).

Almost surely, 2^20207823 is an apocalyptic number.

20207823 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20207823 is a deficient number, since it is larger than the sum of its proper divisors (7907505).

20207823 is a wasteful number, since it uses less digits than its factorization.

20207823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292893.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 20207823 is about 4495.3112239310. The cubic root of 20207823 is about 272.3787211067.

The spelling of 20207823 in words is "twenty million, two hundred seven thousand, eight hundred twenty-three".