30420323123 has 4 divisors (see below), whose sum is σ = 30935921880. Its totient is φ = 29904724368.

The previous prime is 30420323119. The next prime is 30420323137. The reversal of 30420323123 is 32132302403.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32132302403 = 103 ⋅311964101.

It is a cyclic number.

It is not a de Polignac number, because 30420323123 - 2² = 30420323119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30420323183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257799290 + ... + 257799407.

It is an arithmetic number, because the mean of its divisors is an integer number (7733980470).

Almost surely, 2^30420323123 is an apocalyptic number.

30420323123 is a deficient number, since it is larger than the sum of its proper divisors (515598757).

30420323123 is an equidigital number, since it uses as much as digits as its factorization.

30420323123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515598756.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 30420323123 its reverse (32132302403), we get a palindrome (62552625526).

The spelling of 30420323123 in words is "thirty billion, four hundred twenty million, three hundred twenty-three thousand, one hundred twenty-three".