20313123 has 4 divisors (see below), whose sum is σ = 27084168. Its totient is φ = 13542080.

The previous prime is 20313121. The next prime is 20313133. The reversal of 20313123 is 32131302.

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 20313123 - 2¹ = 20313121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20313121) 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 3 ways as a sum of consecutive naturals, for example, 3385518 + ... + 3385523.

It is an arithmetic number, because the mean of its divisors is an integer number (6771042).

Almost surely, 2^20313123 is an apocalyptic number.

20313123 is a deficient number, since it is larger than the sum of its proper divisors (6771045).

20313123 is an equidigital number, since it uses as much as digits as its factorization.

20313123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6771044.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 20313123 is about 4507.0082094445. The cubic root of 20313123 is about 272.8510102250.

Adding to 20313123 its reverse (32131302), we get a palindrome (52444425).

The spelling of 20313123 in words is "twenty million, three hundred thirteen thousand, one hundred twenty-three".