20355323 has 4 divisors (see below), whose sum is σ = 20504040. Its totient is φ = 20206608.

The previous prime is 20355287. The next prime is 20355331. The reversal of 20355323 is 32355302.

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 20355323 - 2⁸ = 20355067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20355373) 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, 74153 + ... + 74426.

It is an arithmetic number, because the mean of its divisors is an integer number (5126010).

Almost surely, 2^20355323 is an apocalyptic number.

20355323 is a deficient number, since it is larger than the sum of its proper divisors (148717).

20355323 is a wasteful number, since it uses less digits than its factorization.

20355323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148716.

The product of its (nonzero) digits is 2700, while the sum is 23.

The square root of 20355323 is about 4511.6873783541. The cubic root of 20355323 is about 273.0398265591.

The spelling of 20355323 in words is "twenty million, three hundred fifty-five thousand, three hundred twenty-three".