20304514123 has 4 divisors (see below), whose sum is σ = 20325820968. Its totient is φ = 20283207280.

The previous prime is 20304514079. The next prime is 20304514147. The reversal of 20304514123 is 32141540302.

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 20304514123 - 2⁹ = 20304513611 is a prime.

It is a super-2 number, since 2×20304514123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20304514523) 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, 10651993 + ... + 10653898.

It is an arithmetic number, because the mean of its divisors is an integer number (5081455242).

Almost surely, 2^20304514123 is an apocalyptic number.

20304514123 is a deficient number, since it is larger than the sum of its proper divisors (21306845).

20304514123 is an equidigital number, since it uses as much as digits as its factorization.

20304514123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21306844.

The product of its (nonzero) digits is 2880, while the sum is 25.

The spelling of 20304514123 in words is "twenty billion, three hundred four million, five hundred fourteen thousand, one hundred twenty-three".