20302120123 has 4 divisors (see below), whose sum is σ = 20303254368. Its totient is φ = 20300985880.

The previous prime is 20302120087. The next prime is 20302120159. The reversal of 20302120123 is 32102120302.

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

It is an interprime number because it is at equal distance from previous prime (20302120087) and next prime (20302120159).

It is a cyclic number.

It is not a de Polignac number, because 20302120123 - 2⁹ = 20302119611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20302120097 and 20302120106.

It is not an unprimeable number, because it can be changed into a prime (20302124123) 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, 539836 + ... + 576217.

It is an arithmetic number, because the mean of its divisors is an integer number (5075813592).

Almost surely, 2^20302120123 is an apocalyptic number.

20302120123 is a deficient number, since it is larger than the sum of its proper divisors (1134245).

20302120123 is a wasteful number, since it uses less digits than its factorization.

20302120123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134244.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20302120123 its reverse (32102120302), we get a palindrome (52404240425).

The spelling of 20302120123 in words is "twenty billion, three hundred two million, one hundred twenty thousand, one hundred twenty-three".