20423343 has 4 divisors (see below), whose sum is σ = 27231128. Its totient is φ = 13615560.

The previous prime is 20423329. The next prime is 20423353. The reversal of 20423343 is 34332402.

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

It is not a de Polignac number, because 20423343 - 2⁸ = 20423087 is a prime.

It is a super-2 number, since 2×20423343² = 834225878591298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423353) 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, 3403888 + ... + 3403893.

It is an arithmetic number, because the mean of its divisors is an integer number (6807782).

Almost surely, 2^20423343 is an apocalyptic number.

20423343 is a deficient number, since it is larger than the sum of its proper divisors (6807785).

20423343 is an equidigital number, since it uses as much as digits as its factorization.

20423343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6807784.

The product of its (nonzero) digits is 1728, while the sum is 21.

The square root of 20423343 is about 4519.2192909838. The cubic root of 20423343 is about 273.3436212996.

Adding to 20423343 its reverse (34332402), we get a palindrome (54755745).

The spelling of 20423343 in words is "twenty million, four hundred twenty-three thousand, three hundred forty-three".