20155323 has 4 divisors (see below), whose sum is σ = 26873768. Its totient is φ = 13436880.

The previous prime is 20155321. The next prime is 20155327. The reversal of 20155323 is 32355102.

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

It is not a de Polignac number, because 20155323 - 2¹ = 20155321 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 20155323.

It is not an unprimeable number, because it can be changed into a prime (20155321) 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, 3359218 + ... + 3359223.

It is an arithmetic number, because the mean of its divisors is an integer number (6718442).

Almost surely, 2^20155323 is an apocalyptic number.

20155323 is a deficient number, since it is larger than the sum of its proper divisors (6718445).

20155323 is an equidigital number, since it uses as much as digits as its factorization.

20155323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6718444.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 20155323 is about 4489.4680085730. The cubic root of 20155323 is about 272.1426362254.

The spelling of 20155323 in words is "twenty million, one hundred fifty-five thousand, three hundred twenty-three".