20302123 has 4 divisors (see below), whose sum is σ = 21184848. Its totient is φ = 19419400.

The previous prime is 20302099. The next prime is 20302133. The reversal of 20302123 is 32120302.

It is a happy number.

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 20302123 - 2⁵ = 20302091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20302133) 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, 441328 + ... + 441373.

It is an arithmetic number, because the mean of its divisors is an integer number (5296212).

Almost surely, 2^20302123 is an apocalyptic number.

20302123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20302123 is a deficient number, since it is larger than the sum of its proper divisors (882725).

20302123 is an equidigital number, since it uses as much as digits as its factorization.

20302123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882724.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20302123 is about 4505.7877224743. The cubic root of 20302123 is about 272.8017497372.

Adding to 20302123 its reverse (32120302), we get a palindrome (52422425).

The spelling of 20302123 in words is "twenty million, three hundred two thousand, one hundred twenty-three".